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Relevant bibliographies by topics / Airflows

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Academic literature on the topic 'Airflows'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Airflows"

1

Fu, Xiu Zhang, and Jian Dong. "Numerical Analysis on the Impact of Windows and Interior Doors on Indoor Airflow of Rural Residence." Applied Mechanics and Materials 548-549 (April 2014): 1683–88. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.1683.

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There are several factors impacting on the indoor airflows, such as building openings, ambient wind speed, occupants’ behavior and so forth. This paper concentrates on the impact of windows and interior doors on airflows in a rural multi-storey residential building. The indoor airflow simulation was carried out by using the CFD software. 3 states of interior doors were set, and 60 regions were arrayed in bedroom to observe the variation of airflows. According to data of regions, the uniformity of airflow and the thermal comfort were analyzed. Simulation results identified that closing interior doors will increase the mean age of indoor air about 7 times as it under the condition of opening doors, which is from 90s to 666s. It also shows that transom windows is beneficial to improve natural ventilation efficiency, as it can raise the average wind velocity by 40% when interior doors are closed.

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De Vogeleer, Gerlinde, Peter Demeyer, Philippe Van Overbeke, and Jan G. Pieters. "Assessing Airflow Distribution in Vents of a Naturally Ventilated Test Facility Using Reference Air Velocity Measurements." Transactions of the ASABE 61, no. 3 (2018): 1065–76. http://dx.doi.org/10.13031/trans.12458.

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Abstract. Emission measurement in naturally ventilated buildings is a complex task because wind conditions can change quickly, inducing high spatial and temporal variations in the air velocity and pollutant concentration at the vent level. Simply taking the product of differential pollutant concentration and airflow rate may generate inaccurate results because the limited number of measurement locations usually fails to correctly reflect the velocity and concentration distributions in the vents. To assess the predictability of the airflow distribution in the vents of a naturally ventilated building, detailed measurements were conducted in the vents. Linear regression was applied to velocity measurements taken in the vents and at a 10 m mast (meteomast) located 20 m away. The detailed airflow measurements were used to validate statistical models. Results showed that the velocity distribution in the ridge vent could be modeled accurately and precisely for all wind directions (R2 > 89%). Models for unidirectional airflows showed high predictability for the side vent (R2 > 92%). Models for bidirectional airflows showed good predictability for the windward side when the air flowed in the same direction as the outside wind (R2 > 88%) but showed less accurate results for the leeward side as well as for airflows moving in the opposite direction to the outside wind. For all models and wind directions, the most important input variable was the velocity component measured perpendicular to the vents at the meteomast. The importance of the velocity component measured parallel to the vents increased near the edges of the vent when the vent was on the windward side but did not reach the importance of the perpendicular component. The results confirmed the importance of using different models for unidirectional and bidirectional airflows to obtain accurate airflow assessments. Keywords: Airflow rate distribution, Mock-up building, Natural ventilation, Ultrasonic anemometer.

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Yamamoto, Toshiaki, Robert Donovan, and David Ensor. "Model Study for Optimization of Cleanroom Airflows." Journal of the IEST 31, no. 6 (November 1, 1988): 24–29. http://dx.doi.org/10.17764/jiet.1.31.6.et0013l4g2678g46.

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A menu-driven numerical simulation was developed to model the airflow in a typical industrial process cleanroom. The effects of changing entry velocity, isolating curtain height, and return airflow are evaluated. Theoretical guidelines for minimizing the strength of recirculation zones and optimizing the airflows in the cleanroom are discussed. These simulations help identify cleanroom designs that minimize the transport of particle contamination.

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Doyle, Lex William, Louis Irving, Anjali Haikerwal, Katherine Lee, Sarath Ranganathan, and Jeanie Cheong. "Airway obstruction in young adults born extremely preterm or extremely low birth weight in the postsurfactant era." Thorax 74, no. 12 (September 26, 2019): 1147–53. http://dx.doi.org/10.1136/thoraxjnl-2019-213757.

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BackgroundIt is unknown if adults born <28 weeks or <1000 g since surfactant has been available are reaching their full airway growth potential.ObjectiveTo compare expiratory airflow at 25 years and from 8 to 25 years of participants born <28 weeks or <1000 g with controls, and within the preterm group to compare those who had bronchopulmonary dysplasia with those who did not.MethodsAll survivors born <28 weeks or <1000 g in 1991–1992 in Victoria, Australia, were eligible. Controls were born contemporaneously, weighing >2499 g. At 8, 18 and 25 years, expiratory airflows were measured and the results converted to z-scores. Outcomes were compared between groups at age 25 years, and trajectories (change in z-scores per year) from childhood were contrasted between groups.ResultsExpiratory airflows were measured at 25 years on 164 of 297 (55%) preterm survivors and 130 of 260 (50%) controls. Preterm participants had substantially reduced airflow compared with controls at age 25 years (eg, zFEV1; mean difference −0.97, 95% CI −1.23 to –0.71; p<0.001). Preterm participants had lower airflow trajectories than controls between 8 and 18 years, but not between 18 and 25 years. Within the preterm group, those who had bronchopulmonary dysplasia had worse airflows and trajectories than those who did not.ConclusionsYoung adults born <28 weeks or <1000 g in the surfactant era, particularly those who had bronchopulmonary dysplasia, have substantially reduced airway function compared with controls. Some are destined to develop COPD in later adult life.

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Lestinen, Sami, Mark Wesseling, Risto Kosonen, Hannu Koskela, and Dirk Müller. "Airflow characteristics under planar opposed ventilation jets in a controlled indoor environment." E3S Web of Conferences 111 (2019): 01029. http://dx.doi.org/10.1051/e3sconf/201911101029.

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Healthy, comfortable and intelligent indoor environment is a key objective in comprehensive well-being. This is also a main target of advanced HVAC-technology. In indoor environments, air distribution plays a major role while providing clean air to occupants. Therefore, investigating ventilation jets is an essential matter. In this study, the main objective was to improve knowledge on numerical modeling and airflow characteristics. In addition, the reliability of modeling methods were investigated. The experiments were carried out in a test room by using omnidirectional anemometers. The planar air jets were supplied below the ceiling from the opposite long-side walls. The exhaust openings were correspondingly near the floor. Isothermal and incompressible viscous airflow was simulated by using RANS, URANS, DES (SST-k-ω - LES) and SBES (SST-k-ω - LES) methods. The results show that modeling method has considerable effects on the predicted airflow field. However, the study indicates that correctly implemented numerical modeling may predict well the averaged airflow characteristics. Furthermore, the unsteady simulation allows airflows to fluctuate reasonably. In addition, SBES and DES methods were more sensitive in generating the airflow fluctuations than URANS. A recommendation is to carefully test and choose a modeling method for indoor airflows.

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Przydrozny, Edward, and Aleksandra Przydrozna. "Temperature and airflow setting in dual-duct ventilation systems." E3S Web of Conferences 116 (2019): 00063. http://dx.doi.org/10.1051/e3sconf/201911600063.

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Past experiences of excess energy consumption and malfunctioning controls introduced prejudice when considering dual-duct ventilation systems during design stages. Modern technologies, however, can be used to improve performance and control of dual-duct systems, thus making these a sensible and safe design option. In the paper, we discuss challenges associated with setting the warm and cold supply air temperatures and how these set-points affect the airflows. We present limitations in temperature settings, due to instantaneous room thermal conditions and the individual design temperature requirements. Portions of warm and cold air (the ratio of these in the ventilating airflow) affect the transport costs of ventilating airflow. In many cases, rational control of warm and cold air temperature set-points, in a yearly cycle, enables distribution of similar portions of warm and cold air within the system. Even airflows in warm and cold air installations minimise the overall flow resistance, so that the air transport costs are minimal. Simultaneously, apart from minimising the energy for air transport, the primary energy demand for air treatment should be controlled and minimised.

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He, Nan, and Xing Hai Zhao. "Numerical Simulation on Separation Characteristic of an Elbow Bias-Oriented Rich-Lean Burner." Advanced Materials Research 960-961 (June 2014): 327–31. http://dx.doi.org/10.4028/www.scientific.net/amr.960-961.327.

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In order to solve the problem of that the boiler burns inferior coal but cannot guarantee the combustion stability, the rich-lean burner divides primary wind pulverized coal airflow into two stocks of airflows containing different amounts of pulverized coal and sends the airflows into coal-fired furnace for improving the ignition characteristics. By the numerical simulation of the pulverized coal flow characteristics in an elbow bias-oriented rich-lean burner, regarding the “concentration ratio” and “speed difference” as the standard of evaluating the separation characteristic of the burner, considering the influence of the partition plate length, bias current stopper height and primary wind velocity to the separation effect of pulverized coal so as to provide technical assistances for the elbow bias-oriented rich-lean burner’s practical application and improvement.

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Wang, Yuanchen, Christian Lodroner, Michael Müller, and Konstantinos Stergiaropoulos. "Monitoring of Indoor Airflows with a New Two-Dimensional Airflow Sensor." E3S Web of Conferences 111 (2019): 05005. http://dx.doi.org/10.1051/e3sconf/201911105005.

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Although airflow is invisible, it has a big influence on the indoor environment. An incorrectly planned HVAC systems can lead to draught and thermal discomfort in occupied zones. Since the commissioning tests required after the installation of HVAC systems are generally performed without occupancy, the tests results do not always accurately represent the airflow that occurs during ordinary usage. The airflow needs to be continuously monitored and controlled by an intelligent HVAC system. The aim of this study is to develop a new two-dimensional airflow sensor for the monitoring of indoor airflow, which can also indicate the flow direction. Several of these sensors can be placed in a planar sensor array, by which a two-dimensional section of the flow field is created. By recording data from several of these arrays simultaneously, an image of the three-dimensional flow could be acquired. The prototype of the sensor, which is made by Hahn-Schickard Society for Applied Research is currently being validated at the Institute for Building Energetics, Thermotechnology and Energy Storage. When the development is completed, it will greatly contribute to the control strategies of HVAC systems.

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F. dos Santos, Bárbara, Matheus Maciel, Albaniza A. Tavares, Clarissa Q. B. de Araújo Fernandes, Wladymyr B. de Sousa, Marcus Lia Fook, Itamara Farias Leite, and Suédina de Lima Silva. "Synthesis and Preparation of Chitosan/Clay Microspheres: Effect of Process Parameters and Clay Type." Materials 11, no. 12 (December 12, 2018): 2523. http://dx.doi.org/10.3390/ma11122523.

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This work aimed to prepare chitosan/clay microspheres, by the precipitation method, for use in drug carrier systems. The influence of the process parameters, particularly two airflows of the drag system (2.5 and 10 L·min−1) on the microspheres physical dimensions and properties, such as microstructure, degree of swelling and porosity were evaluated. The samples were characterized by optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). Water absorption and porosity tests were also performed. The results showed that the process parameters affected the size of the microspheres. The diameter, volume and surface area of the chitosan/clay microspheres decreased when they were prepared with the higher airflow of the drag system. The microspheres presented a porous microstructure, being the pore size, percentage of porosity and degree of swelling affected not only by the process parameters but also by the type of clay. Hybrids (chitosan/clay) with intercalated morphology were obtained and the hybrid prepared with montmorillonite clay at higher airflows of the drag system presented the greatest interlayer spacing and a more disordered morphology. Thus, it is certain that the chitosan/clay nanocomposite microspheres prepared with montmorillonite (CL clay) at higher airflows of the drag system can have good drug-controlled release properties.

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Orani, G. P., J. W. Anderson, G. Sant'Ambrogio, and F. B. Sant'Ambrogio. "Upper airway cooling and l-menthol reduce ventilation in the guinea pig." Journal of Applied Physiology 70, no. 5 (May 1, 1991): 2080–86. http://dx.doi.org/10.1152/jappl.1991.70.5.2080.

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Cooling of the upper airway, which stimulates specific cold receptors and inhibits laryngeal mechanoreceptors, reduces respiratory activity in unanesthetized humans and anesthetized animals. This study shows that laryngeal cooling affects the pattern of breathing in the guinea pig and assesses the potential role of cold receptors in this response by using a specific stimulant of cold receptors (l-menthol). The response to airflows (30 ml/s, 10-s duration) through the isolated upper airway was studied in 23 anesthetized (urethan, 1 g/kg ip) guinea pigs breathing through a tracheostomy. Respiratory airflow, tidal volume, laryngeal temperature, and esophageal pressure were recorded before the challenges (control), during cold airflows (25 degrees C, 55% relative humidity), and during warm airflows (37 degrees C, saturated) with or without the addition of l-menthol. Whereas warm air trials had no effect, cold air trials, which lowered laryngeal but not nasal temperature, reduced ventilation (VE) to 85% of control, mainly by prolonging expiratory time (TE, 145% of control), an effect abolished by laryngeal anesthesia. Addition of l-menthol to the warm airflow caused a greater reduction in VE (41% of control) by prolonging TE (1,028% of control). Nasal anesthesia markedly reduced the apneogenic effect of l-menthol but did not affect the response to cold air trials. In conclusion, both cooling of the larynx and l-menthol in the laryngeal lumen reduce ventilation. Exposure of the nasal cavity to l-menthol markedly enhances this ventilatory inhibition; considering the stimulatory effect of l-menthol on cold receptors, these results suggest a predominant role of nasal cold receptors in this response.

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Dissertations / Theses on the topic "Airflows"

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Baillie, Neil Alexander. "Modelling nasal airflows." Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419445.

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Paterson, Colin. "Thin fluid films subject to external airflows." Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=22389.

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We use lubrication theory to analyse the steady flow of thin ridges, rivulets and rings of fluid and, in particular, we study the behaviour when the fluid is in the presence of an external airflow. Firstly, a thin ridge on an inclined planar substrate subject to a spatially varying pressure gradient due to an external airflow is considered. The effect of increasing the strength of the external airflow, and of increasing the inclination of the substrate to the horizontal, on a ridge of prescribed constant volume is investigated, and we identify and quantify the conditions for the ridge to de-pin at one or both of its contact lines. Secondly, we describe the possible pinning and subsequent de-pinning of a thin rivulet with constant nonzero contact angle as well as the possible de-pinning and subsequent re-pinning of a thin rivulet with constant width as they flow with prescribed volume flux in the azimuthal direction from the top to the bottom of a large horizontal cylinder. Thirdly, this problem is extended to include the effects of a prescribed uniform azimuthal surface shear stress arising from an external airflow in the direction opposing gravity. Lastly, we consider a thin ring of fluid with constant width and constant mass that flows in the azimuthal direction all the way round a large horizontal cylinder (a "full ring" of fluid) subject to a prescribed uniform azimuthal surface shear stress due to an external airflow. In particular, there is a maximum mass of fluid above which no full-ring solution exists, and we show that backflow near the cylinder surface is possible.

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Ramadhan, Abdulmajeed A. "Electrohydrodynamic driven airflows for microelectronics thermal management." Thesis, University of Leeds, 2018. http://etheses.whiterose.ac.uk/21163/.

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The increasing demand for effective and compact thermal solutions for the next generation of thin and high-power density consumer electronics is challenging the capability of miniature mechanical systems to meet the required cooling performance. Due to their attractive and unique advantages with no moving parts, design flexibility, small-scale structure, low height profile, silent operation, and effective flow generation, electrohydrodynamic (EHD) air movers are well positioned to become a key emerging cooling technology as alternative to conventional rotary fans. In its general objective, this thesis aims to investigate the benefits and highlight the features of EHD air movers as a thermal management cooling solution in advanced and small-scale microelectronics, supporting all previous efforts in this direction. Due to the strong influence of the geometric parameters of EHD devices on the corona discharge process and the resulting EHD flow, numerical modelling represents a powerful tool to design and optimize EHD devices, especially of complex and small-scale structures, where the capability of experimental investigations is limited or challenging. This study presents an accurate and validated numerical method to solve the coupled equations of electrostatics, charge transport and fluid flow for the two-dimensional (2D) modelling of EHD airflow induced through a wire-to-plane/grid channel configuration, and is the first to develop a three-dimensional model (3D) that couples the EHD flows with conjugate heat transfer modelling. Based on thermal management requirements and from a design perspective, a comprehensive investigation and analysis into the influence of geometric parameters on the efficiency of EHD wire-to-grid blowers is performed and optimal configurations are proposed for a range of heights from 9 to 15 mm. Results reveal that using fine emitter wires is more efficient than thicker ones, and the grounded electrode locations affect significantly the electric field distribution and the blower efficiency. It is also found that using the grid as a further collector increases the blower performance, with higher flow production, lower operating voltage and reduced blower size. Further numerical developments are devoted to optimize the configuration of miniature wire-to-plane EHD blowers for heights up to 10 mm, which is the most preferred geometry for integration in the cooling systems of thin electronic applications. For ranges of fixed operating power and voltage, the efficient optimized electrode gaps are predicted and defined by simple expressions. The influence of channel sidewall on the EHD flow rate and velocity profile are investigated and the results show that the 2D modelling is valid to effectively predict flow rates produced by wide and short EHD blowers compared to that obtained by 3D simulations. A combined EHD air blower that enables a reduction in the level of applied voltage and a control of flow production is developed. Performance comparisons against commercial rotary blowers demonstrate that the optimized miniature EHD blowers are more competitive for cooling miniaturized and extended heated surfaces based on blower size, flow rate with uniform velocity profile, and power consumption. A novel design of an EHD system integrated with compact heat sinks is presented as a thermal management cooling solution for advanced and thin consumer applications. Results of a parametric study demonstrate that the EHD system offers flexible structure design with the ability to reduce the height and increase the width as required, providing a unique feature to be installed in low-profile laptops. Moreover, compared to traditional cooling systems used in the current standard low power laptops, the proposed EHD system offers promising cooling performance with higher thermal design power (TDP), reduced thermal solution volume and lower height profile.

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Jalil, Latif Imran. "Stabilising airflows in chilled ceiling/displacement ventilation environments." Thesis, De Montfort University, 2005. http://hdl.handle.net/2086/4237.

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Wallaart, Johannes Christiaan Safety Science Faculty of Science UNSW. "Identification, elimination and reduction of barriers to the effective use of respiratory personal protective equipment." Publisher:University of New South Wales. Safety Science, 2008. http://handle.unsw.edu.au/1959.4/43293.

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This thesis is concerned with the identification, elimination and reduction of barriers to the use of personal respiratory protective equipment (RPE) in the workplace to reduce and prevent occupational inhalation disease. Respiratory Protective Equipment (RPE) is widely used in industry, health, emergency response, military settings and many other applications and are in daily use by thousands of people in Australasia. The equipment is generally used to filter or ab/adsorb the contaminants from the air prior to delivery to the wearer by filtering or ad/absorbing contaminants from the air prior to being breathed. There is increasing concerns being expressed worldwide as well as in Australia and New Zealand about the apparent increase in diagnosed occupational diseases and the use of RPE is an essential preventative measure able to be adopted by workplaces. The use of this type of equipment is the option after the preferred options of elimination and isolation of the individual from the contaminant in the atmosphere. In spite of this, many different types of RPE are routinely in use. There are, however, enormous practical, physiological and psychological difficulties in the wearing of RPE. Concerns have been expressed in the literature as well as in practical situations that many different types of RPE was unable to meet the needs of workers, particularly as related to airflows and that current standards did not reflect the real-life workplace demands. This work set out to determine an improved methodology for users to determine the total inward leakage (TIL), the different types and quantities of airflows, particularly Peak Inspiratory Air Flows (PIAF). When communicating (an essential aspect in the workplace for safety reasons), PIAFs rise dramatically. This work showed that PIAF were very high, particularly when communicating, and is likely to exceed the ability of many commercial types of commercially available respiratory equipment as well being in excess of the certification requirements of standard bodies. In addition, Minute Volumes (MV) in a typical Australian workforce were shown to be very variable between individuals and current certification requirement of airflows do not appear to reflect practical use. The thesis further investigated using a questionnaire survey, the knowledge and current intervention measures adopted by farmers in different sections of agriculture, particularly dairy farming. Agriculture in New Zealand is a critical economic activity, employing 10% of the total workforce. This work showed that in spite of many different types of intervention activity spread over many years by Government agencies and private organisations to date, limited awareness exists of inhalation diseases and appropriate types of RPE in different applications (for example, confined space applications). The research would suggest that a different and more intensive approach is needed by Government agencies to address the problem in this workplace community if workplace inhalation diseases are to be reduced in the future.

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Li, Jain-Guo. "A study of thermally-induced Meso-scale airflows over inhomogeneous terrain." Thesis, Queen Mary, University of London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266253.

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Wood, Graeme Brendon. "The quantification of airflows generated by rotating rollers in wool carding machines." Thesis, University of Canterbury. Department of Mechanical Engineering, 2001. http://hdl.handle.net/10092/2281.

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The properties of fibres make them easily manipulated by aerodynamic forces. The carding machine, used in cotton and wool processing, is an example of equipment that creates aerodynamic forces due to fast rotating cylinders with rough surfaces. These forces are generally seen as an undesirable side effect in fibre processing machinery, exacerbated with modern equipment using faster rotating components. This work attempts to quantify these aerodynamic forces on carding machines used in the wool industry. A combination of boundary layer theory, experiments using hot wire anemometry and flow visualisation, and Computational Fluid Dynamics (CFD) software (Fluent) was used to build up an understanding of aerodynamics in the example of wool carding machines. The theoretical and experimental work progressed along the following topics to determine each effect on carding machine aerodynamics: rough surfaces, centrifugal forces, three-dimensional edge effects, and interactions between rotating cylinders. Examples from each section were modelled using CFD, which was found to accurately simulate theoretical and experimental results in most cases. It could also accurately predict the complex two-dimensional airflow patterns occurring in carding machines. The CFD simulations underestimated the degree of turbulence generated by interactions between rotating cylinders. Three-dimensional effects were overestimated, due in part to attempting to apply the results of an oversimplified model to a full-scale carding machine. In undertaking this work, it was found the universal velocity distribution equations describing flow over flat plates (for both smooth and rough surfaces) could also be used for flow induced by rotating cylinders by compensating for curvature effects.

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Abdelhafez, Ahmed. "Effect of swirl on the choking criteria, shock structure, and mixing in underexpanded supersonic nozzle airflows." College Park, Md.: University of Maryland, 2009. http://hdl.handle.net/1903/9196.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2009.
Thesis research directed by: Dept. of Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Szleper, Michele Lee. "Converging nozzle design for a subsonic wind tunnel to test heat sinks under impinging and parallel airflows." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/17124.

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Pálsson, Daði Snær. "Hybrid Ventilation : Simulation of Natural Airflow in a Hybrid Ventilation System." Thesis, KTH, Installations- och energisystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146761.

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This thesis investigates the possibilities of using hybrid ventilation in an office building in Stockholm. The focus is on simulating the natural airflow to find out for which conditions it is sufficient. The thesis is done at White Arkitekter AB in cooperation and under the supervision of environmental specialists working there. A literature study is carried out to study what has been done before in Sweden as well as in other countries. Computer simulations are used to simulate the airflow to examine the conditions and architecture. A synthetic computer model representing a realistic office building is built up as a starting point. The ventilation method for the natural ventilation part is to take air in through the fa\c{c}ade and use the stack effects in an atrium for natural ventilation. By altering the architecture and the sizes of the openings according to the results from the simulations the building is dimensioned and formed to cope with the rules and requirements about the indoor air quality in workplaces. The simulations are done with a multi zone energy performance simulation tool that can simulate airflows and indoor air climate conditions in the zones as well as the energy consumption. Computational fluid dynamics calculations are then used to more closely simulate the conditions within the zones. The results from those simulations suggest that the natural ventilation as a part of a hybrid ventilation works for all the floors of the building for up to 10$\,^{\circ}\mathrm{C}$. The computational fluid dynamics simulations showed that the thermal comfort of all the occupants is fulfilled for these conditions but there is a risk of occupants experiencing draught because of to high velocities in the air especially for the colder outdoor temperatures. For the higher outdoor temperatures the airflow needs to be enforced to ensure sufficient conditions for the occupants and for the colder temperatures mechanical ventilation is needed to decrease heat losses and avoid the risk of draught.

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Books on the topic "Airflows"

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Klobut, Krzysztof. Distribution of contaminants in buildings by air recirculation and other airflows. Espoo: Helsinki University of Technology, Laboratory of Heating, Ventilating and Air Conditioning, 1991.

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Airflow. Hemel Hempstead: Nexus Special Interests, 1998.

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Lynn, Wray H., ed. Airflow in ducts. Hayward, CA: LAMA Books, 1996.

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Thurlbeck, William M. Chronic airflow obstruction. 2nd ed. Oxford: Blackwell Scientific, 1997.

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L, Felker Travis, ed. Dampers and airflow control. Atlanta, Ga: American Society of Heating, Refrigerating, and Air-Conditioning Engineers, 2009.

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Swaffield, J. A. Transient airflow in building drainage systems. London: Spon Press, 2010.

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Roulet, Claude-Alain. Airflow patterns within buildings: Measurement techniques... Coventry: Air Infiltration and Ventilation Centre, 1991.

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Transient airflow in building drainage systems. Abingdon, Oxon: Spon Press, 2010.

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Swaffield, J. A. Transient airflow in building drainage systems. Abingdon, Oxon: Spon Press, 2010.

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Baechtel, John. Practical engine airflow: Performance theory & application. North Branch, MN: CarTech, 2015.

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Book chapters on the topic "Airflows"

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Hobbs, John R., and Edward P. Conde. "Analysis of Airflows in Personnel Screening Booths." In Advances in Analysis and Detection of Explosives, 437–53. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-017-0639-1_41.

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Brellochs, F., M. Fertig, J. Algermissen, and D. Brüggemann. "Optical Measurements of Hydrogen Mixing in Supersonic Airflows." In Fluid Mechanics and Its Applications, 71–79. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5432-1_6.

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Butterfield, G. R. "Grain transport rates in steady and unsteady turbulent airflows." In Aeolian Grain Transport 1, 97–122. Vienna: Springer Vienna, 1991. http://dx.doi.org/10.1007/978-3-7091-6706-9_6.

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Goldstein, Ken, and John Divelbiss. "Design of Cleanroom Airflows for Particle Control Using CFD Analysis: Case Studies." In Particles in Gases and Liquids 3, 171–87. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-1187-2_12.

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Settles, G. S. "An Overview of Planar Laser Scattering for the Visualization of High-Speed Airflows." In Flow Visualization VI, 628–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84824-7_111.

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Steen Englund, Jessika, Jan Akander, Mikael Björling, and Bahram Moshfegh. "Assessment of Airflows in a School Building with Mechanical Ventilation Using Passive Tracer Gas Method." In Mediterranean Green Buildings & Renewable Energy, 619–31. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30746-6_47.

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Chung, S. K., S. K. Kim, Y. Na, and A. Seo. "Experimental and Numerical Study on the Nasal Airflows in Post-surgery Models: Simulation of Nasal Surgery." In IFMBE Proceedings, 702–5. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14515-5_179.

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Himeno, Ryutaro, Katsuro Fujitani, and Sanae Satoh. "A Study of Aerodynamic Characteristics of Detailed Car Configurations Using a Finite Difference Analysis of Airflows." In Automotive Simulation ’91, 156–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84586-4_14.

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Kim, S. K., J. H. Park, Y. Na, and S. K. Chung. "Experimental and Numerical Study on the Airflows in Four Asymmetric Nasal Cavities Due to Deviated Nasal Septum." In IFMBE Proceedings, 718–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14515-5_183.

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Singh, Pramod. "Airflow." In Learn PySpark, 67–84. Berkeley, CA: Apress, 2019. http://dx.doi.org/10.1007/978-1-4842-4961-1_4.

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Conference papers on the topic "Airflows"

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Xiang, Tianyu, Zicheng Chi, Feng Li, Jun Luo, Lihua Tang, Liya Zhao, and Yaowen Yang. "Powering indoor sensing with airflows." In the 11th ACM Conference. New York, New York, USA: ACM Press, 2013. http://dx.doi.org/10.1145/2517351.2517365.

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Li, Feng, Tianyu Xiang, Zicheng Chi, Jun Luo, Lihua Tang, Liya Zhao, and Yaowen Yang. "Powering indoor sensing with airflows." In the 11th ACM Conference. New York, New York, USA: ACM Press, 2013. http://dx.doi.org/10.1145/2517351.2517393.

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Hirota, K., Y. Ito, T. Amemiya, and Y. Ikei. "Generation of directional wind by colliding airflows." In 2013 World Haptics Conference (WHC 2013). IEEE, 2013. http://dx.doi.org/10.1109/whc.2013.6548460.

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Georgievsky, Pavel, Alexey Ershov, and Vladimir Levin. "Electric Discharges Modeling in a Hypersonic Airflows." In 43rd AIAA Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.2005-201.

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Oler, J. W., C. M. Roseberry, D. P. Jordan, and J. E. Williams. "Ram-Recovery Coefficient Correlations for Automotive Cooling Airflows." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1991. http://dx.doi.org/10.4271/910309.

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Shuzenji, Kiyotaka, and Ryoichi Kato. "Two-stage plasma torch ignition in supersonic airflows." In 37th Joint Propulsion Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2001. http://dx.doi.org/10.2514/6.2001-3740.

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Linder, Stephen Paul, Jim Van Gilder, Yan Zhang, and Enda Barrett. "Dynamic Control of Airflow Balance in Data Centers." In ASME 2019 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ipack2019-6304.

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Abstract Efficient cooling of data center infrastructure is an important way to reduce total energy consumption. Containment, with separation of hot and cold airflows has allowed significant increase in efficiencies. However, balancing the airflow, so that IT equipment in an aisle only receives the cooling airflow that that aisle needs is still often not done. We propose a new architecture where IT racks are clustered together with shared hot aisles ducted to a common ceiling plenum. Each aisle has an actively controlled damper used to balance the airflow to the cooling infrastructure. Using a differential air pressure sensor in each aisle and an algorithm designed to balance the flow network, we minimize the cooling airflow and maximize cooling efficiency.

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Zheng, B., X. Pang, M. Liu, and I. Joo. "Using a Fan Air Flow Station to Control Building Static Pressure in a Variable Volume Air Conditioning System." In ASME 2005 International Solar Energy Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/isec2005-76215.

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A fan airflow station measures airflow through a fan using fan speed, fan head, and the field-calibrated fan curve. This paper presents the theory and techniques of using fan airflow station in a variable volume system for building pressure control. These techniques include fan curve calibration, determination of the volumetric flow difference of the supply and return airflows, and sensor locations. The return fan speed profiles were plotted, and data was collected on building pressure after implementing the fan air flow station. The Implementation of a fan air flow station demonstrates that the return fan speed can track the supply fan speed profile as building loads change, such that building pressure is maintained within a satisfactory range.

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Mathur, Gursaran D. "Water Carryover Characteristics From Evaporator Coils During Transitional Airflows." In SAE 2000 World Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-1268.

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Shuzenji, Kiyotaka, Ryoichi Kato, and Takeshi Tachibana. "Ignition characteristics of arc discharges exposed to supersonic airflows." In 38th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2000. http://dx.doi.org/10.2514/6.2000-617.

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Reports on the topic "Airflows"

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Stratton, J. Chris, W. J. N. Turner, Craig P. Wray, and Iain S. Walker. Measuring Residential Ventilation System Airflows: Part 1 – Laboratory Evaluation of Airflow Meter Devices. Office of Scientific and Technical Information (OSTI), November 2012. http://dx.doi.org/10.2172/1168595.

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Stratton, J. Chris, W. J. N. Turner, Craig P. Wray, and Iain S. Walker. Measuring Residential Ventilation System Airflows: Part 1 – Laboratory Evaluation of Airflow Meter Devices. Office of Scientific and Technical Information (OSTI), November 2012. http://dx.doi.org/10.2172/1168596.

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Kurabuchi, T., J. B. Fang, and Richard A. Grot. A numerical method for calculating indoor airflows using a turbulence model. Gaithersburg, MD: National Institute of Standards and Technology, 1990. http://dx.doi.org/10.6028/nist.ir.89-4211.

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Chiasson, L. A., and A. W. Stokes. Determination of the methane make on 9 east longwall face using SF? derived airflows. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/304939.

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TUTU, N. K., C. R. KRISHNA, J. W. ANDREWS, and T. A. BUTCHER. CHARACTERIZATION OF AIRFLOWS NEAR THE EXIT OF HVAC REGISTERS USING LASER DOPPLER VELOCIMETRY (LDV). Office of Scientific and Technical Information (OSTI), March 2003. http://dx.doi.org/10.2172/809913.

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Walker, Iain S., Craig P. Wray, Cyril Guillot, and S. Masson. Evaluation of commercially available techniques and development of simplified methods for measuring grille airflows in HVAC systems. Office of Scientific and Technical Information (OSTI), August 2003. http://dx.doi.org/10.2172/819472.

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Klinowski, G. W., and A. W. Stokes. Field measurement of airflows induced through hollow shaft venturis on double ended ranging drum shearers in the Sydney Coalfield. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/304777.

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Lorenzetti, D. M. Assessing multizone airflow software. Office of Scientific and Technical Information (OSTI), December 2001. http://dx.doi.org/10.2172/795952.

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Caress, R. W., D. W. MacArthur, K. S. Allander, J. A. Bounds, M. M. Catlett, S. E. Garner, J. D. Johnson, J. P. Johnson, and D. A. Rutherford. LRAD-based airflow monitors. Office of Scientific and Technical Information (OSTI), March 1994. http://dx.doi.org/10.2172/10130984.

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Harrje, D. (Airflow patterns within buildings). Office of Scientific and Technical Information (OSTI), November 1989. http://dx.doi.org/10.2172/5452864.

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