Dissertations / Theses on the topic 'Residence time and flushing'
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Morillo, Sebastian. "Engineering solutions to water quality problems in lakes." University of Western Australia. Centre for Water Research, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0153.
Full textHarris, A. T. "Residence time distributions in circulating fluidised beds." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.603761.
Full textMunkebye, Knut-Arne Rademacher. "Residence time distribtion: Konduktivitetsmålinger på eksperimentell tubulær blandetank reaktor." Thesis, Norges Teknisk-Naturvitenskaplige Universitet, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-21119.
Full textMurphy, Terry 1955. "Residence time distribution of solid particles in a CSTR." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79251.
Full textNadeau, Patrice. "Measurement of residence time distribution by laser absorption spectroscopy." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22666.
Full textMatthews, Samuel Aaron 1962. "High pressure biomass liquefaction in a short-residence time autoclave." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/277800.
Full textBall, Jason. "Investigating the importance of residence time in controlling catchment hydrochemistry." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286915.
Full textDauben, Verena. "Phytoplankton induced changes of air bubble residence time in seawater." Thesis, University of Southampton, 2005. https://eprints.soton.ac.uk/41356/.
Full textHopley, Alexandra. "Liquid Residence Time Distribution in Micro-reactors with Complex Geometries." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37111.
Full textHe, Youzhang. "Residence time distributions of liquids and particulates in a holding tube." Thesis, University of Reading, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308106.
Full textGlasser, Mary. "Migration through time : a residence history analysis of a rural population." Thesis, University of Leicester, 2002. http://hdl.handle.net/2381/30399.
Full textTANYEL, ZEYNEP. "Residence Time Distribution of Multiple Particles in Four Configurations of Holding Tubes." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-08102004-124311/.
Full textSaruchera, Thomas. "Measurement and modelling of particle residence time in a return-flow cyclone." Thesis, University of Canterbury. Chemical and Process Engineering, 1999. http://hdl.handle.net/10092/7212.
Full textHiggins, Philip Richard. "The characterisation of the hydrodynamic vortex separator using residence time distribution analysis." Thesis, Liverpool John Moores University, 2000. http://researchonline.ljmu.ac.uk/5534/.
Full textHolland, Jeff F. "Nonideal and Pulsed Flow: Applying Residence Time Distributions to Stormwater Treatment Wetlands." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406812534.
Full textChoi, Mee H. "Residence time distribution as a measure for stochastic resonance in a bistable system." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/29349.
Full textChen, Dong. "An on-line measurement of residence time distribution in a twin-screw extruder /." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61235.
Full textThe RTD of a ZSK-30 twin-screw extruder was measured with and without an in-line rheometer installed. Various operating conditions were used to examine their effects on the RTD curve. It was found that the mean residence time of the system decreased linearly with screw speed and exponentially with the feed rate. The temperature effect was minuscule. The in-line rheometer increased the mean residence time of the system by 80%.
Glover, II Leslie James. "The Influence of Residence Time and Organic Acids on the Desorption of Goethite." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/33478.
Full textMaster of Science
Gibson, Borbor Auzzel Kwaku Kudar. "Residence time investigation of artificial silver ores in heap leaching using cyanide lixiviant." Master's thesis, Faculty of Engineering and the Built Environment, 2020. http://hdl.handle.net/11427/32642.
Full textTiev, Visoth. "Vegetation and discharge effects on the hydraulic residence time distribution within a natural pond." Thesis, University of Warwick, 2011. http://wrap.warwick.ac.uk/49201/.
Full textPayne, Robert R. U. Tatarchuk Bruce J. "Electrochemical characterization and modelling of fuel cells via AC impedance and residence time distribution." Auburn, Ala., 2008. http://hdl.handle.net/10415/1420.
Full textMu, Yan, and Yan Mu. "Slurry Mean Residence Time Analysis and Pad-Wafer Contact Characterization in Chemical Mechanical Planarization." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/621459.
Full textKennedy, Dennis Lee. "Redesign of Industrial Column Flotation Circuits Based on a Simple Residence Time Distribution Model." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/35510.
Full textMaster of Science
Salengke, C. "Residence time distribution of model food particles in the curved section of holding tube." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1301602949.
Full textWei, Xiaomin. "FUNDAMENTAL CHARACTERIZATION OF TRIBOLOGICAL, THERMAL, FLUID DYNAMIC AND WEAR ATTRIBUTES OF CONSUMABLES IN CHEMICAL MECHANICAL PLANARIZATION." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/195125.
Full textAjibode, Oluyomi Marriet. "Effect of Residence Time on Microbial and Chemical Quality of Reclaimed Water In Urban Infrastructures." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/228512.
Full textHuang, Lumeng. "Transport through Georeservoirs: Spatial Entropy in Hydraulic Properties, and Temporal Entropy in Residence Time Distributions." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1275920344.
Full textRosenthal, Daniel Jay. "The critical properties of thermally stable and unstable fluids using a low residence time flow method." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/10223.
Full textAl-hengari, Salah. "Process intensification : a study of micromixing and residence time distribution characteristics in the spinning disc reactor." Thesis, University of Newcastle Upon Tyne, 2012. http://hdl.handle.net/10443/1771.
Full textWales, Nadine Jenifer. "The effect of prewetting on the residence time distribution and hydrodynamic parameters in trickle bed reactors." Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-09042008-123057/.
Full textDokoupil, Jan. "Residence Erasmus - příprava, realizace a řízení stavby." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226481.
Full textKumar, Rajesh. "Non-traditional grains in low and high moisture extrusion applications –residence time, physico-chemical properties and resistant starch." Thesis, Kansas State University, 2017. http://hdl.handle.net/2097/38210.
Full textDepartment of Grain Science and Industry
Sajid Alavi
Sorghum, millets and teff are important staple crops worldwide, especially in semi-arid regions of Africa and India because of their drought tolerance. However, lack of research and other limitations have restricted their usage in food products. This study is focused on extrusion processing of low and high tannin sorghum varieties, millet and teff for high and low moisture applications, and to investigate process characteristics such as residence time distribution and specific mechanical energy, physico-chemical properties of resultant food products (such as pre-cooked pasta and expanded snacks) and their resistance starch content. Results from preliminary lab scale extrusion, including optimization of starch type and level for pre-cooked pasta and in-barrel moisture for expanded snacks, were used to design pilot-scale studies on a twin-screw extruder. In the first pilot-scale experiment, decorticated white sorghum blends prepared with addition of mono-glycerides (0.5%, 1% and1.5%) and salt (1%) were processed at three different in-barrel moisture contents 40%, 44% and 48% (wet basis) for processing of precooked pasta. The optimum formulation containing 1% mono-glycerides and process conditions corresponding to 48% in-barrel moisture were also used to develop precooked teff and millet pasta. The non-traditional grain based pastas were investigated for cooking quality, thermal characteristics using differential scanning calorimeter, pasting properties using rapid visco analyzer and texture profile analysis. In general, increasing in-barrel moisture led to reduction in solid losses (ranging from 4.0-8.2% for all treatments), indicating improvement in cooking quality. On the other hand, increase in mono-glycerides concertation led to higher cooking losses, and also affected pasting and textural properties significantly. Sorghum-based precooked pasta was of best quality while millet pasta was poorest in cooking quality, visual and textural attributes. Cooking loss for control pre-cooked pasta produced in this experiment using semolina was 4.5%, and commercial semolina pasta was 3.2%. Residence time distribution in pilot-scale twin screw extruder, during high moisture process conditions used for pre-cooked pasta, was also investigated at three different in-barrel moistures (40%, 44% and 48%) and monoglycerides/ lipid (0.5, 1% and 1.5%) concentrations. Increase in in-barrel moisture significantly decreased mean residence time. For example, mean residence time was 4.47 min at 40% moisture, 3.89 min at 44% and 3.74 min at 48%. On the contrary, residence time significantly increased with lipid level. For example, mean residence time was 3.87 min at 0.5% concentration of mono-glycerides, 4.48 min at 1% and 4.70 min 1.5%. In the second experiment focusing on low moisture applications, pilot-scale twin screw extrusion was used to process decorticated white sorghum and high tannin sumac sorghum for expanded snacks. The addition of sumac bran decreased the specific mechanical energy input (366-578 kJ/kg) and expansion ratio (6.4-7.9), and resulted in higher piece density of extrudates. Use of sumac bran and sumac flour led to increase in resistant starch content, although it was less than 1% for all treatments. Therefore, extrusion with ingredients having high tannin content does not provide value, despite tannins being associated with resistant starch at least in raw materials.
Haile, Estifanos. "CHEMICAL EVOLUTION AND RESIDENCE TIME OF GROUNDWATER IN THE WILCOX AQUIFER OF THE NORTHERN GULF COASTAL PLAIN." UKnowledge, 2011. http://uknowledge.uky.edu/ees_etds/2.
Full textZhao, Xiaofei. "Harvesting Microalgae-Development of a Short Residence Time Method Using Rapid-response Temperature-sensitive Semi-IPN Hydrogels." University of Toledo / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1434501731.
Full textSonnenwald, Frederick C. "Identifying the residence time distributions of urban drainage structures from solute transport data using maximum entropy deconvolution." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/5468/.
Full textSéguin, Marc-André. "Fuel Residence Times for Clean Combustion of Coal in a Pressurized Fluidized Bed - Cold Flow Study." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36244.
Full textMendes, Ana Lúcia Mesquita. "Fito-ETAR uma tecnologia aplicada ao tratamento de águas residuais: análise do comportamento hidráulico." Master's thesis, ISA, 2010. http://hdl.handle.net/10400.5/3352.
Full textIt became increasingly necessary to promote the use of low-cost technologies (in the construction and maintenance) on the implementation of sanitation in small agglomerations, yet never failing to ensure appropriate treatment efficiencies. The construction of constructed wetlands, in these rural areas allows the reproducing of mechanisms of degradation of pollutants that occur in natural wetlands, in a system for waste water purification. The process consists of passing the wastewater through a medium (usually after being pre-sedimented), where, roots of macrophytes and microbial communities that degrade organic matter in wastewater assimilating the nutrients existing in it, grow. The study of the hydraulic behavior of these alternative systems of sanitation was based on the analysis of constructed wetland of Barroca D'Alva in Alcochete with a subsurface horizontal flow. The performance evaluation and effectiveness of the tracer (potassium bromide) introduced, the measurement of water level inside the bed and the analysis of the hydrographs of the flow, allowed a study of the hydraulic behavior and also the development of a simplified one-dimensional model applied to the transport that occurs within the bed, which allows to model the detention times of a non reactive solute.
McClintock, Samuel Alan. "Effects of temperature and mean cell residence time on the performance of high-rate biological nutrient removal processes." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-08252008-162825/.
Full textYim, Samson Sau Shun. "The effect of flow stability on residence time distribution of Newtonian and non-Newtonian liquids in couette flow." Thesis, University College London (University of London), 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264191.
Full textAgizza, Maria Angela [Verfasser], Andreas [Akademischer Betreuer] Dreizler, Tiziano [Akademischer Betreuer] Faravelli, and Giancarlo [Akademischer Betreuer] Sorrentino. "Residence Time Distribution modeling of combustors through Chemical Reactor Network / Maria Angela Agizza ; Andreas Dreizler, Tiziano Faravelli, Giancarlo Sorrentino." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2020. http://d-nb.info/1211088650/34.
Full textAgizza, Maria Angela [Verfasser], Andreas Akademischer Betreuer] Dreizler, Tiziano [Akademischer Betreuer] [Faravelli, and Giancarlo [Akademischer Betreuer] Sorrentino. "Residence Time Distribution modeling of combustors through Chemical Reactor Network / Maria Angela Agizza ; Andreas Dreizler, Tiziano Faravelli, Giancarlo Sorrentino." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2020. http://d-nb.info/1211088650/34.
Full textBremm, Alessandra Baldissarelli. "Habitar a escola : minúcias de encontros entre arte e educação." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/170335.
Full textThe research is based on daily teaching concerns of an art teacher from a public elementary school who, by relating her artistic processes to teaching issues and to the studies of the concepts of "life as a work of art" (NIETZSCHE, 2012) and "aesthetics of existence" (FOUCAULT, 2004a), perceives art as a way of researching in education. With the development of an artistic residence in a elemetary public school of Porto Alegre - RS, the aim was to try to produce other times and spaces to problematize the emergencies of the encounters between art and school, from the following problematic: In what ways a residence can problematize the times and spaces of the school, from the encounters between art and education?. The experiences of the artistic residence in the school allowed problematize, in an artistic way, questions related to the school routine, teaching and its challenges in the contemporary world. The art permeated the research, in an expanded sense, from the theoretical references, as an attitude to life, as well, through artistic productions developed in the residence and works of artists that contribute to think the emerging issues in this work. The encounters between art and school have raised questions related to the minutiae of the school, understood here as powers to think of it in the following lines of force: the school as a space of alterity, in the other(s) as foreign(s) and the times and the school spaces in relation to the times of art The ways of doing research in the school are related to notions of artistic residency, as well as of art-based educational research, in order to emphasize the specificity of an artistic research carried out in the educational field. At the same time, we tried to operate on the power of the interstices, producing fissures between the boundaries that delimit what is considered art and what is considered education. The school was conceived as a creative power in its multiplicity of practices, without the intention of performing diagnoses or prescriptions. The character of exchange permeated all the actions of the residence, in which the researcher & teacher & artist's place was in constant movement in the school, making it possible to affirm the potency of spaces "between" beyond delimitations. In the intersection between the experiences lived in the artistic residence and the school, the power of art is affirmed as another time and space to think the relations between school, art and education in the contemporary world.
Parker, Brian Mark. "The Simulation and Analysis of Particle Flow Through an Aggregate Stockpile." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/35932.
Full textMaster of Science
Wan, Shaolong. "Characterization of early stage coal oxidation and effects of gas residence time on NO(x) reduction in oxy-coal combustion /." Full text available from ProQuest UM Digital Dissertations, 2009. http://0-proquest.umi.com.umiss.lib.olemiss.edu/pqdweb?index=0&did=1839607861&SrchMode=1&sid=5&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1268676055&clientId=22256.
Full textTypescript. Vita. "May 2009." Major professor: Dr. Wei-Yin Chen Includes bibliographical references (leaves 121-132). Also available online via ProQuest to authorized users.
Lin, Joyce T. Camassa Roberto. "An experimental and mathematical study on the prolonged residence time of a sphere falling through stratified fluids at low Reynolds number." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2009. http://dc.lib.unc.edu/u?/etd,2488.
Full textTitle from electronic title page (viewed Oct. 5, 2009). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Mathematics." Discipline: Mathematics; Department/School: Mathematics.
Alhamdan, Abdullah M. "Particle Residence Time Distribution and Bulk Heat Transfer Coefficients of Two-Phase Flow in Scraped Surface Heat Exchanger and Holding Tubes /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487929230742153.
Full textCox, Shane Joseph Chemical Sciences & Engineering Faculty of Engineering UNSW. "Design and analysis of a photocatalytic bubble column reactor." Awarded by:University of New South Wales, 2007. http://handle.unsw.edu.au/1959.4/37818.
Full textFangueiro, Gomes Leonel. "Etude du couplage hydrodynamique/adsorption : application au lit mobile simulé." Thesis, Ecully, Ecole centrale de Lyon, 2015. http://www.theses.fr/2015ECDL0031.
Full textHydrodynamics inside industrial Simulated Moving Bed (SMB) adsorption columns can be complex due to the presence of internal distribution devices, free flow chambers and heterogeneous injections. These have to be taken into account in SMB numerical models to scale-up purposes. In the present thesis, a CFD approach is adopted as an intermediate step to develop a 1D model simple enough to be used for cyclic SMB simulations while being able to represent realistic hydrodynamics. This model results from the interpretation of the moments of the fluid age distribution, transported by CFD according to the method developed by Liu and Tilton (2010) that allows to estimate the degree of mixing (Liu, 2011) of the adsorption columns. The resulting 1D model consists in the two examples provided by Zwietering (1959) of a completely segregated system and a maximum mixedness system. This model is able to reproduce the residence time distribution of the CFD model of an adsorption column, while being representative of the internal flow patterns. This results in a good representation of the coupling of adsorption and hydrodynamics by the 1D model. When integrated in a SMB simulator and compared to the traditionally used dispersed plug flow model, the new 1D model demonstrates that for most of the adsorption column geometries considered a detailed hydrodynamic description is mandatory. Such detailed hydrodynamic description is even more important when employing adsorbents with better mass transfer performances than those currently used for the p-xylene purification, which is expected in the upcoming years
Pacheco, Ruiz Santiago. "Submerged anaerobic membrane bioreactor for wastewater treatment : effect of mean cell residence time on membrane flux, mixed liquor characteristics and overall reactor performance." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/403002/.
Full textZhou, Tiya. "Residence time and survival studies for Enterococcus faecium as a surrogate for Salmonella during preconditioning and extrusion processing of dry expanded pet food." Thesis, Kansas State University, 2016. http://hdl.handle.net/2097/32905.
Full textFood Science
Sajid Alavi
Validation studies on process equipment are an important step for effective pathogenic control during dry expanded pet food manufacturing. The preconditioner is used to hydrate, mix and pre-cook raw materials before extrusion of pet food. The High-Intensity-Preconditioner (HIP) was designed with two independently driven shafts, thus offering control of both shaft speed and rotational direction with potential for improving residence time and thus pathogen inactivation. Residence time distribution (RTD) of raw dog food mix was impacted by the HIP process parameters (average residence time varying between 104-178 s for dry experiment and 65-177 s with steam addition) depending on shaft speed and direction. In general, increase in shaft speed resulted in shorter residence time with the larger shaft having a greater impact than the smaller shaft. Rotational direction of shafts also had an effect on average residence time (a maximum difference of 37 s was noticed between treatments with different shaft directions and the same speed). The uniformity of residence time distribution (difference of 97-132 s between 15 and 85 percentiles of the cumulative RTD) also varied considerably with process conditions, with uniformity increasing with shaft speed. Enterococcus faecium (ATCC® 8459™) was chosen as a surrogate for Salmonella for microbial inactivation studies on the HIP. Both HIP shaft speed (200 and 300 rpm) and process temperature (67-70°C and 89-91°C) impacted E.faecium survival. Lower shaft speed (corresponding to longer residence time) or higher temperature led to greater E.faecium inactivation. A 5 log CFU/g of E.faecium was reduced using selective agar (m-Enterococcus or mE agar) after treatment with high temperature, but approximately 3.5 log CFU/g of E.faecium reduced on non-selective agar (Brain Heart Infusion or BHI agar). Uneven heat distribution, inadequate residence time and system instability might have negatively affected the inactivation. Microbial inactivation, with E.faecium as surrogate, was also studied for the complete dry expanded pet food process using a pilot-scale single-screw extruder with a regular double shaft preconditioner. Meal was inoculated with E.faecium at 6 log CFU/g and processed. Preconditioner downspout temperature ranged from 89-94°C and extrusion die temperature was between 120-140°C. Complete inactivation was observed after extrusion.