Journal articles: 'Buongiorno'

1

Sobol, Walentyna. "BUONGIORNO, SIORA MASCARA!" Studia Ukrainica Posnaniensia 4 (May 20, 2016): 249. http://dx.doi.org/10.14746/sup.2016.4.30.

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Alessandro Carrera. "Buongiorno, sono il vostro pilota." Sirena: poesia, arte y critica 2008, no. 2 (2008): 26. http://dx.doi.org/10.1353/sir.0.0032.

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Chen, Mingwen, Yefan Tian, Weidong Yang, and Xuehui Chen. "Mixed Convection of Fractional Nanofluids Considering Brownian Motion and Thermophoresis." Fractal and Fractional 6, no. 10 (October 12, 2022): 584. http://dx.doi.org/10.3390/fractalfract6100584.

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In this paper, the mixed convective heat transfer mechanism of nanofluids is investigated. Based on the Buongiorno model, we develop a novel Cattaneo–Buongiorno model that reflects the non-local properties as well as Brownian motion and thermophoresis diffusion. Due to the highly non-linear character of the equations, the finite difference method is employed to numerically solve the governing equations. The effectiveness of the numerical method and the convergence order are presented. The results show that the rise in the fractional parameter δ enhances the energy transfer process of nanofluids, while the fractional parameter γ has the opposite effect. In addition, the effects of Brownian motion and thermophoresis diffusion parameters are also discussed. We infer that the flow and heat transfer mechanism of the viscoelastic nanofluids can be more clearly revealed by controlling the parameters in the Cattaneo–Buongiorno model.

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Fabre, Marie. "Buongiorno, notte : « approfondir l'histoire par infidélité »." Sociétés & Représentations 29, no. 1 (2010): 127. http://dx.doi.org/10.3917/sr.029.0127.

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Guan, Qiangshun, Yit Fatt Yap, Hongying Li, and Zhizhao Che. "Modeling of Nanofluid-Fluid Two-Phase Flow and Heat Transfer." International Journal of Computational Methods 15, no. 08 (October 31, 2018): 1850072. http://dx.doi.org/10.1142/s021987621850072x.

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This paper presents a model for two-phase nanofluid-fluid flow and heat transfer. The nonuniform nanoparticles are transported using Buongiorno model by convection, Brownian diffusion and thermophoresis. This is the first attempt to employ Buongiorno model for two-phase nanofluid-fluid flow. The moving interface between the nanofluid and the immiscible fluid is captured using the level-set method. The model is first verified and then demonstrated for coupled flow and heat transfer in (1) a water–alumina nanofluid-filled cavity with a rising silicone oil drop and (2) stratified flow of water–alumina nanofluid, pure water and silicone oil in a channel.

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Bondareva, N. S., M. A. Sheremet, and I. Pop. "Magnetic field effect on the unsteady natural convection in a right-angle trapezoidal cavity filled with a nanofluid." International Journal of Numerical Methods for Heat & Fluid Flow 25, no. 8 (November 2, 2015): 1924–46. http://dx.doi.org/10.1108/hff-07-2014-0236.

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Purpose – Unsteady natural convection of water-based nanofluid within a right-angle trapezoidal cavity under the influence of a uniform inclined magnetic field using the mathematical nanofluid model proposed by Buongiorno is presented. The paper aims to discuss these issues. Design/methodology/approach – The left vertical and right inclined walls of the enclosure are kept at constant but different temperatures whereas the top and bottom horizontal walls are adiabatic. All boundaries are assumed to be impermeable to the base fluid and to nanoparticles. In order to study the behavior of the nanofluid, a non-homogeneous Buongiorno’s mathematical model is taken into account. The physical problems are represented mathematically by a set of partial differential equations along with the corresponding boundary conditions. By using an implicit finite difference scheme the dimensionless governing equations are numerically solved. Findings – The governing parameters are the Rayleigh, Hartmann and Lewis numbers along with the inclination angle of the magnetic field relative to the gravity vector, the aspect ratio and the dimensionless time. The effects of these parameters on the average Nusselt number along the hot wall, as well as on the developments of streamlines, isotherms and isoconcentrations are analyzed. The results show that key parameters have substantial effects on the flow, heat and mass transfer characteristics. Originality/value – The present results are new and original for the heat transfer and fluid flow in a right-angle trapezoidal cavity under the influence of a uniform inclined magnetic field using the mathematical nanofluid model proposed by Buongiorno. The results would benefit scientists and engineers to become familiar with the flow behavior of such nanofluids, and the way to predict the properties of this flow for possibility of using nanofluids in advanced nuclear systems, in industrial sectors including transportation, power generation, chemical sectors, ventilation, air-conditioning, etc.

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Sisca, Vittoria. "F. Buongiorno et al., La fenomenologia in Italia." Phenomenological Reviews 4, no. 1 (2018): 65. http://dx.doi.org/10.19079/pr.4.1.65.

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Rafique, Khuram, Muhammad Imran Anwar, Masnita Misiran, Ilyas Khan, Asiful H. Seikh, El-Sayed M. Sherif, and Kottakkaran Sooppy Nisar. "Keller-Box Simulation for the Buongiorno Mathematical Model of Micropolar Nanofluid Flow over a Nonlinear Inclined Surface." Processes 7, no. 12 (December 4, 2019): 926. http://dx.doi.org/10.3390/pr7120926.

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Brownian motion and thermophoresis diffusions are the fundamental ideas of abnormal upgrading in thermal conductivity via binary fluids (base fluid along with nanoparticles). The influence of Brownian motion and thermophoresis are focused on in the Buongiorno model. In this problem, we considered the Buongiorno model with Brownian motion and thermophoretic effects. The nonlinear ordinary differential equations are recovered from the partial differential equations of the boundary flow via compatible similarity transformations and then employed to the Keller-box scheme for numerical results. The physical quantities of our concern including skin friction, Nusselt number, and Sherwood number along with velocity, temperature and concentration profile against involved effects are demonstrated. The impacts of the involved flow parameters are drawn in graphs and tabulated forms. The inclination effect shows an inverse relation with the velocity field. Moreover, the velocity profile increases with the growth of the buoyancy effect.

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Coudry, Marianne. "Pierangelo Buongiorno, Sebastian Lohsse, Francesco Verrico (Edd.): Miscellanea senatoria." Gnomon 93, no. 2 (2021): 49–52. http://dx.doi.org/10.17104/0017-1417-2021-2-49.

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Cassarà, Bruno. "F. Buongiorno, V. Costa, R. Lanfredini, Phenomenology in Italy." Phenomenological Reviews 6 (2020): 36. http://dx.doi.org/10.19079/pr.6.36.

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Ciammella, Patrizia, Berardino De Bari, Alba Fiorentino, Pierfrancesco Franco, Silvio Cavuto, Filippo Alongi, Lorenzo Livi, and Andrea Riccardo Filippi. "The “BUONGIORNO” Project: Burnout Syndrome Among Young Italian Radiation Oncologists." Cancer Investigation 31, no. 8 (September 6, 2013): 522–28. http://dx.doi.org/10.3109/07357907.2013.830735.

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Revnic, Cornelia, Eiyad Abu-Nada, Teodor Grosan, and Ioan Pop. "Natural convection in a rectangular cavity filled with nanofluids." International Journal of Numerical Methods for Heat & Fluid Flow 28, no. 6 (June 4, 2018): 1410–32. http://dx.doi.org/10.1108/hff-06-2017-0244.

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Purpose This paper aims to develop a numerical study of the steady natural convection in a rectangular cavity filled with the CuO–water-based nanofluid. It is assumed that the viscosity of nanofluids depends on the temperature and on the nanofluids volume fraction. Design/methodology/approach The mathematical nanofluid model has been formulated on the basis of the model proposed by Buongiorno (2006). The system of partial differential equations is written in terms of a dimensionless stream function, vorticity, temperature and the volume fraction of the nanoparticles, and is solved numerically using the finite difference method for different values of the governing parameters. Findings It is found that both fluid flow and heat transfer coefficient are affected by the considered parameters. Thus, the Nusselt number is slowly increasing with increasing volume fraction from 2 per cent to 5 per cent and it is more pronounced increasing with increasing Rayleigh number from 103 to 105. Originality/value Buongiorno’s (2006) nanofluid model has been applied for the flow with the characteristics as mentioned in the paper. A comprehensive survey on the behavior of flow and heat transfer characteristics has been presented. All plots presented in the paper are new and are not reported in any other study.

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Akhter, Shaheen, and Muhammad Ashraf. "DARCY-FORCHHEIMER FLOW OF NANOFLUID WITH GYROTACTIC MICROORGANISMS USING BUONGIORNO MODEL." Journal of Porous Media 24, no. 8 (2021): 1–21. http://dx.doi.org/10.1615/jpormedia.2021036551.

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14

Sheremet, M. A., and Ioan Pop. "Free convection in a triangular cavity filled with a porous medium saturated by a nanofluid." International Journal of Numerical Methods for Heat & Fluid Flow 25, no. 5 (June 1, 2015): 1138–61. http://dx.doi.org/10.1108/hff-06-2014-0181.

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Purpose – Steady-state free convection heat transfer in a right-angle triangular porous enclosure filled by a nanofluid using the mathematical nanofluid model proposed by Buongiorno has been numerically analyzed. The paper aims to discuss this issue. Design/methodology/approach – The nanofluid model takes into account the Brownian diffusion and thermophoresis effects. The governing equations formulated in terms of the vorticity-stream function variables were solved by finite difference method. Findings – It has been found that the average Nusselt number is an increasing function of the Rayleigh and Lewis numbers and a decreasing function of Brownian motion, buoyancy-ratio and thermophoresis parameters. At the same time the average Sherwood number is an increasing function of the Rayleigh and Lewis numbers, Brownian motion and thermophoresis parameters and a decreasing function of buoyancy-ratio parameter. Originality/value – The present results are new and original for the heat transfer and fluid flow in a right-angle triangular porous enclosure filled by a nanofluid using the mathematical nanofluid model proposed by Buongiorno. The results would benefit scientists and engineers to become familiar with the flow behaviour of such nanofluids, and the way to predict the properties of this flow for possibility of using nanofluids in advanced nuclear systems, in industrial sectors including transportation, power generation, chemical sectors, ventilation, air-conditioning, etc.

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Jawad, Muhammad, Salah Boulaaras, Niaz Ali Shah, Rashid Jan, and Sulima Ahmed Zubair. "Analytic Simulation for Magnetohydrodynamic Unsteady Buongiorno Model Hybrid Nanofluid Flow over Stretching." Advances in Mathematical Physics 2022 (June 13, 2022): 1–16. http://dx.doi.org/10.1155/2022/6423730.

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In this work, we inspect and analyze a two dimensional, unsteady mixed convectional hybrid nanofluid hydromagnetic flow (Al2O3-Cu/H2O) over a convectional heated an extending/contracting surface with the influence of thermal radiation. Hybrid nanofluid (Al2O3-Cu/H2O) flows with magnetohydrodynamic and heat source or sink. Brownian motion and thermophoresis were incorporated using the Buongiorno model. Hybrid nanofluid with vol. fraction range limited to 1.5% and within the higher temperature range of 50°C to 70°C is considered for thermal conductivity and viscosity analysis. The proposed model is then converted into ODEs through similarity transformation with the help of homotopy analysis. The effect of embedded input factors on the temperature, velocity, and concentration profiles is visually demonstrated and explained. The magnetic field has inverse impact on velocity and temperature profiles. Velocity profile increases for both mixed convection and buoyancy ratio parameters. It has been noticed that the temperature profile increases with thermal radiation. For increasing values of Lewis number, the concentration of hybrid nanoparticles is considerably lowered. Moreover, we observed an increase in the concentration of hybrid nanoparticles through a destructive chemical reaction, whereas a generative chemical reaction has the reverse effect. It has been proved that skin friction is increasing function of ε , M and decreasing function of λ 1 , N r . On the other hand, Nusselt number increased with the increase of R , Q , N b , N t while Sherwood number is decreased, with the increase of N b , N t , L e .

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Khan, W. A., A. Aziz, and Naseem Uddin. "Buongiorno Model for Nanofluid Blasius Flow with Surface Heat and Mass Fluxes." Journal of Thermophysics and Heat Transfer 27, no. 1 (January 2013): 134–41. http://dx.doi.org/10.2514/1.t3916.

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Venkatesh, P., A. Felicita, B. J. Gireesha, and B. Nagaraja. "Darcy-Forchheimer Convective Flow of Casson nanofluid in the Microchannel: Buongiorno Model." JNNCE Journal of Engineering and Management 5, no. 2 (January 31, 2022): 48. http://dx.doi.org/10.37314/jjem.2021.050213.

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Khammash, Marwan, and Gareth Havard Griffiths. "‘Arrivederci CIAO.com, Buongiorno Bing.com’—Electronic word-of-mouth (eWOM), antecedences and consequences." International Journal of Information Management 31, no. 1 (February 2011): 82–87. http://dx.doi.org/10.1016/j.ijinfomgt.2010.10.005.

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Sayyar, Ramin Onsor, and Mohsen Saghafian. "Numerical simulation of convective heat transfer of nonhomogeneous nanofluid using Buongiorno model." Heat and Mass Transfer 53, no. 8 (March 10, 2017): 2627–36. http://dx.doi.org/10.1007/s00231-017-2008-5.

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Brahim, Fersadou, Walid Nessab, and Henda Kahalerras. "Convection mixte MHD d’un nanofluide (eau-Cu) dans une cavité ouverte." MATEC Web of Conferences 261 (2019): 04001. http://dx.doi.org/10.1051/matecconf/201926104001.

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Dans la présente étude, le problème de la convection mixte MHD d’un nanofluide (eau - Cu) confiné dans une cavité ouverte munie de deux sources de chaleur est étudié numériquement. Le modèle de Buongiorno est utilisé pour décrire l’écoulement du nanofluide en tenant compte du mouvement Brownien et de l’effet thermophorèse. Les équations gouvernantes avec les conditions aux limites associées sont résolues par la méthode des volumes finis. Les résultats révèlent un transfert de chaleur accru avec l’augmentation du rapport d’ouverture (R) et du nombre de Hartmann (Ha).

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Nessab, Walid, Brahim Fersadou, and Henda Kahalerras. "Etude d’un jet de ferrofluide confiné en présence de deux sources magnétiques." MATEC Web of Conferences 261 (2019): 04002. http://dx.doi.org/10.1051/matecconf/201926104002.

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La présente étude est une analyse numérique du transfert de chaleur et de l’écoulement d’un jet de ferrofluide confiné dans un canal plan en présence de deux sources magnétiques. Le modèle de Buongiorno est utilisé pour décrire l’écoulement du ferrofluide avec la prise en compte de l’effet ferrohydrodynamique. Les équations gouvernantes avec les conditions aux limites associées sont résolues par la méthode des volumes finis. Les résultats révèlent une amélioration du transfert de chaleur avec l’augmentation du nombre magnétique (Mn) et la réduction du rapport d’ouverture (R).

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Shahzad, Faisal, Wasim Jamshed, Rabha W. Ibrahim, Kottakkaran Sooppy Nisar, Muhammad Amer Qureshi, Syed M. Hussain, Siti Suzilliana Putri Mohamed Isa, Mohamed R. Eid, Abdel-Haleem Abdel-Aty, and I. S. Yahia. "Comparative Numerical Study of Thermal Features Analysis between Oldroyd-B Copper and Molybdenum Disulfide Nanoparticles in Engine-Oil-Based Nanofluids Flow." Coatings 11, no. 10 (September 30, 2021): 1196. http://dx.doi.org/10.3390/coatings11101196.

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Apart from the Buongiorno model, no effort was ably accomplished in the literature to investigate the effect of nanomaterials on the Oldroyd-B fluid model caused by an extendable sheet. This article introduces an innovative idea regarding the enforcement of the Tiwari and Das fluid model on the Oldroyd-B fluid (OBF) model by considering engine oil as a conventional base fluid. Tiwari and Das’s model takes into account the volume fraction of nanoparticles for heat transport enhancement compared to the Buongiorno model that depends significantly on thermophoresis and Brownian diffusion impacts for heat transport analysis. In this paper, the thermal characteristics of an Oldroyd-B nanofluid are reported. Firstly, the transformation technique is applied on partial differential equations from boundary-layer formulas to produce nonlinear ordinary differential equations. Subsequently, the Keller-box numerical system is utilized to obtain final numerical solutions. Copper engine oil (Cu–EO) and molybdenum disulfide engine oil (MoS2–EO) nanofluids are considered. From the whole numerical findings and under the same condition, the thermodynamic performance of MoS2–EO nanofluid is higher than that of Cu–EO nanofluid. The thermal efficiency of Cu–EO over MoS2–EO is observed between 1.9% and 43%. In addition, the role of the porous media parameter is to reduce the heat transport rate and to enhance the velocity variation. Finally, the impact of the numbers of Reynolds and Brinkman is to increase the entropy.

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Buongiorno Nardelli, Bruno. "A multi-year time series of observation-based 3D horizontal and vertical quasi-geostrophic global ocean currents." Earth System Science Data 12, no. 3 (August 3, 2020): 1711–23. http://dx.doi.org/10.5194/essd-12-1711-2020.

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Abstract. Estimates of 3D ocean circulation are needed to improve our understanding of ocean dynamics and to assess their impact on marine ecosystems and Earth climate. Here we present the OMEGA3D product, an observation-based time series of (quasi-)global 3D ocean currents covering the 1993–2018 period, developed by the Italian Consiglio Nazionale delle Ricerche within the European Copernicus Marine Environment Monitoring Service (CMEMS). This dataset was obtained by applying a diabatic quasi-geostrophic (QG) diagnostic model to the data-driven CMEMS-ARMOR3D weekly reconstruction of temperature and salinity as well as ERA Interim fluxes. Outside the equatorial band, vertical velocities were retrieved in the upper 1500 m at 1∕4∘ nominal resolution and successively used to compute the horizontal ageostrophic components. Root mean square differences between OMEGA3D total horizontal velocities and totally independent drifter observations at two different depths (15 and 1000 m) decrease with respect to corresponding estimates obtained from zero-order geostrophic balance, meaning that estimated vertical velocities can also be deemed reliable. OMEGA3D horizontal velocities are also closer to drifter observations than velocities provided by a set of reanalyses spanning a comparable time period but based on data assimilation in ocean general circulation numerical models. The full OMEGA3D product (released on 31 March 2020) is available upon free registration at https://doi.org/10.25423/cmcc/multiobs_glo_phy_w_rep_015_007 (Buongiorno Nardelli, 2020a). The reduced subset used here for validation and review purposes is openly available at https://doi.org/10.5281/zenodo.3696885 (Buongiorno Nardelli, 2020b).

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Mahanthesh, Basavarajappa, and Bijjanal Jayanna Gireesha. "Dual Solutions for Unsteady Stagnation-Point Flow of Prandtl Nanofluid Past a Stretching/shrinking Plate." Defect and Diffusion Forum 388 (October 2018): 124–34. http://dx.doi.org/10.4028/www.scientific.net/ddf.388.124.

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Dual solutions for the time-dependent flow of a Prandtl fluid containing nanoparticles along a stretching/shrinking surface are presented. The nano Prandtl fluid fills the porous stretching/shrinking surface. The Buongiorno model is employed by accounting Brownian motion and thermophoresis slip mechanisms in the analysis. The relevant nonlinear problem is treated numerically via Runge-Kutta-Fehlberg scheme. The flow profiles are scrutinized with respect to the different governing parameters. Results of this study indicate that the temperature boundary layer thickness increased due to the influence of nanoparticles.

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Mahanthesh, B., S. A. Shehzad, Joby Mackolil, and N. S. Shashikumar. "Heat transfer optimization of hybrid nanomaterial using modified Buongiorno model: A sensitivity analysis." International Journal of Heat and Mass Transfer 171 (June 2021): 121081. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2021.121081.

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Sheikholeslami, M., D. D. Ganji, and M. M. Rashidi. "Magnetic field effect on unsteady nanofluid flow and heat transfer using Buongiorno model." Journal of Magnetism and Magnetic Materials 416 (October 2016): 164–73. http://dx.doi.org/10.1016/j.jmmm.2016.05.026.

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Bakar, Nor Ashikin Abu, Norfifah Bachok, and Norihan Md Arifin. "MOVING PLATE IN A NANOFLUID USING BUONGIORNO MODEL AND THERMOPHYSICAL PROPERTIES OF NANOLIQUIDS." JP Journal of Heat and Mass Transfer 14, no. 1 (February 17, 2017): 119–29. http://dx.doi.org/10.17654/hm014010119.

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Khan, M., A. Ahmed, and J. Ahmed. "Transient flow of magnetized Maxwell nanofluid: Buongiorno model perspective of Cattaneo-Christov theory." Applied Mathematics and Mechanics 41, no. 4 (February 26, 2020): 655–66. http://dx.doi.org/10.1007/s10483-020-2593-9.

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Mustafa, M. "MHD nanofluid flow over a rotating disk with partial slip effects: Buongiorno model." International Journal of Heat and Mass Transfer 108 (May 2017): 1910–16. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2017.01.064.

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Pop, Ioan, Mikhail Sheremet, and Dalia Sabina Cimpean. "Natural convection in a partially heated wavy cavity filled with a nanofluid using Buongiorno’s nanofluid model." International Journal of Numerical Methods for Heat & Fluid Flow 27, no. 4 (April 3, 2017): 924–40. http://dx.doi.org/10.1108/hff-12-2015-0529.

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Purpose The main purpose of this numerical study is to provide a solution for natural convection in a partially heated, wavy cavity filled with a nanofluid using Buongiorno’s nanofluid model. Design/methodology/approach The domain of interest is a two-dimensional cavity bounded by an isothermal left wavy wall, adiabatic horizontal flat walls and right flat wall with a partial isothermal zone. To study the behaviour of the nanofluid, a two-phase Buongiorno mathematical model with the effects of the Brownian motion and thermophoresis is used. The governing dimensionless partial differential equations with corresponding boundary conditions were numerically solved by the finite difference method of the second-order accuracy using the algebraic transformation of the physical wavy cavity in a computational rectangular domain. The study has been conducted using the following values of the governing parameters: Ra = 104-106, Le = 10, Pr = 6.26, Nr = 0.1, Nb = 0.1, Nt = 0.1, A = 1, κ = 1-3, b = 0.2, hhs/L = 0.25, h1/L = 0.0-0.75 and τ = 0-0.25. Findings It is found that an increase in the undulation number leads to a weak intensification of convective flow and a reduction of Nū because of more essential cooling of the wavy troughs where the temperature gradient decreases. Variations of the heater location show a modification of the fluid flow and heat transfer. The upper position of the heater reflects the minimum heat transfer rate, while the position between the bottom part and the middle section (h1/L = 0.25) characterizes an enhancement of heat transfer. Originality/value The originality of this work is to analyse the natural convection in a partially heated wavy cavity filled by a nanofluid using Buongiorno’s nanofluid model. The results will benefit scientists and engineers to become familiar with the flow behaviour of such nanofluids, and the way to predict the properties of this flow for possibility of using nanofluids in advanced nuclear systems, in industrial sectors including transportation, power generation, chemical sectors, ventilation, air-conditioning, etc.

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Sajid, Tanveer, Wasim Jamshed, Faisal Shahzad, M. A. Aiyashi, Mohamed R. Eid, Kottakkaran Sooppy Nisar, and Anurag Shukla. "Impact of Maxwell velocity slip and Smoluchowski temperature slip on CNTs with modified Fourier theory: Reiner-Philippoff model." PLOS ONE 16, no. 10 (October 14, 2021): e0258367. http://dx.doi.org/10.1371/journal.pone.0258367.

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The present article presents a novel idea regarding the implementation of Tiwari and Das model on Reiner-Philippoff fluid (RPF) model by considering blood as a base fluid. The Cattaneo-Christov model and thermal radiative flow have been employed to study heat transfer analysis. Tiwari and Das model consider nanoparticles volume fraction for heat transfer enhancement instead of the Buongiorno model which heavily relies on thermophoresis and Brownian diffusion effects for heat transfer analysis. Maxwell velocity and Temperature slip boundary conditions have been employed at the surface of the sheet. By utilizing the suitable transformations, the modeled PDEs (partial-differential equations) are renewed in ODEs (ordinary-differential equations) and treated these equations numerically with the aid of bvp4c technique in MATLAB software. To check the reliability of the proposed scheme a comparison with available literature has been made. Other than Buongiorno nanofluid model no attempt has been made in literature to study the impact of nanoparticles on Reiner-Philippoff fluid model past a stretchable surface. This article fills this gap available in the existing literature by considering novel ideas like the implementation of carbon nanotubes, CCHF, and thermal radiation effects on Reiner-Philippoff fluid past a slippery expandable sheet. Momentum, as well as temperature slip boundary conditions, are never studied and considered before for the case of Reiner-Philippoff fluid past a slippery expandable sheet. In the light of physical effects used in this model, it is observed that heat transfer rate escalates as a result of magnification in thermal radiation parameter which is 18.5% and skin friction coefficient diminishes by the virtue of amplification in the velocity slip parameter and maximum decrement is 67.9%.

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Roşca, Natalia C., Alin V. Roşca, Emad H. Aly, and Ioan Pop. "Flow and Heat Transfer Past a Stretching/Shrinking Sheet Using Modified Buongiorno Nanoliquid Model." Mathematics 9, no. 23 (November 27, 2021): 3047. http://dx.doi.org/10.3390/math9233047.

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This paper studies the boundary layer flow and heat transfer characteristics past a permeable isothermal stretching/shrinking surface using both nanofluid and hybrid nanofluid flows (called modified Buongiorno nonliquid model). Using appropriate similarity variables, the PDEs are transformed into ODEs to be solved numerically using the function bvp4c from MATLAB. It was found that the solutions of the resulting system have two branches, upper and lower branch solutions, in a certain range of the suction, stretching/shrinking and hybrid nanofluids parameters. Both the analytic and numerical results are obtained for the skin friction coefficient, local Nusselt number, and velocity and temperature distributions, for several values of the governing parameters. It results in the governing parameters considerably affecting the flow and heat transfer characteristics.

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Ghasemian, Amirhossein, Saeed Dinarvand, Armen Adamian, and Mikhail A. Sheremet. "Unsteady General Three-Dimensional Stagnation Point Flow of a Maxwell/Buongiorno Non-Newtonian Nanofluid." Journal of Nanofluids 8, no. 7 (July 1, 2019): 1544–59. http://dx.doi.org/10.1166/jon.2019.1701.

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Sreedhar Babu, M., Velpula V. Ramana, G. Ravisankar, C. S. K. Raju, M. N. Bashir, and Sabir A. Shehzad. "Unsteady natural convection magnetohydrodynamic stagnation point flow with assisting and opposing characteristics: Buongiorno model." Heat Transfer 49, no. 8 (June 25, 2020): 4226–45. http://dx.doi.org/10.1002/htj.21824.

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Zhu, Jing, Dan Yang, Liancun Zheng, and Xinxin Zhang. "Effects of second order velocity slip and nanoparticles migration on flow of Buongiorno nanofluid." Applied Mathematics Letters 52 (February 2016): 183–91. http://dx.doi.org/10.1016/j.aml.2015.09.003.

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De Bari, B., P. Ciammella, A. Fiorentino, F. Alongi, P. Franco, T. Chekrine, L. Livi, and A. R. Filippi. "Projet « BUONGIORNO » : enquête italienne sur l’incidence du burnout chez les jeunes oncologues radiothérapeutes italiens." Cancer/Radiothérapie 15, no. 6-7 (October 2011): 620. http://dx.doi.org/10.1016/j.canrad.2011.07.166.

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G, Venkatesan, Subramanyam Reddy Anala, Srinivas S, and Jagadeshkumar K. "Entropy Analysis on Pulsating Flow of Oldroyd-B Nanofluid in a Vertical Channel with Thermophoresis and Brownian Motion." ECS Transactions 107, no. 1 (April 24, 2022): 12241–51. http://dx.doi.org/10.1149/10701.12241ecst.

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The magnetohydrodynamic pulsatile Oldroyd-B non-Newtonian nanofluid flow via vertical channel with Joule heating, thermal radiation, and viscous dissipation is investigated in the present study. The influence of thermophoresis and Brownian motion are taken into account. In this investigation, the Buongiorno model is used to analyze the entropy generation. The governing coupled partial differential equations are converted into Ordinary differential equations with the help of the perturbation method and numerically solved by using the Runge-Kutta 4th-order scheme along with the shooting method. The impacts of different emerging parameters for temperature, entropy generation, nanoparticles concentration, Bejan number, heat, and mass transfer rate are examined in detail.

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38

Shahzadi, Iqra, and Nabeela Kausar. "Doubly stratified non-Newtonian nanofluid flow featuring nonlinear convection." International Journal of Numerical Methods for Heat & Fluid Flow 30, no. 10 (August 6, 2020): 4389–401. http://dx.doi.org/10.1108/hff-04-2019-0351.

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Purpose The formulation of nonlinear convective non-Newtonian material is reported in this communication. Aspects of thermal radiation and heat source are taken into account for heat transport analysis. The novel stratifications (thermal and solutal) and convective conditions are considered simultaneously. The boundary-layer concept is implemented to simplify the complex mathematical expressions. Design/methodology/approach The well-known optimal homotopy scheme develops the computations. Optimal values regarding nonzero auxiliary variables are calculated and examined. Findings Nonlinear convective flow; Thixotropic non-Newtonian material; Thermal radiation; Heat source; Stratifications and convective conditions; Buongiorno model. Originality/value To the best of authors’ knowledge, no such analysis has yet been reported.

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Khan, Noor. "Mixed convection in mhd second grade nanofluid flow through a porous medium containing nanoparticles and gyrotactic microorganisms with chemical reaction." Filomat 33, no. 14 (2019): 4627–53. http://dx.doi.org/10.2298/fil1914627k.

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Mixed convection in magnetohydrodynamic second grade nanofluid flow through a porous medium containing nanoparticles and gyrotactic microorganisms with chemical reaction is considered. Buongiorno?s nanofluid model is used incorporating the buoyancy forces and Darcy-Forchheimer effect. Nanoparticles increase the thermal conduction in bioconvection flow and microorganisms simultaneously increase the stability of nanofluids. For the constructive (or generation) chemical reaction, the mass transfer displays an increasing behavior. Ordinary differential equations together with the boundary conditions are obtained through the similarity variables from the governing equations of the problem, which are solved by the Homotopy Analysis Method (HAM). The investigations are presented through graphs and the results are interpreted which depict the influences of all the embedded parameters.

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Tayeb, Mhamed, Mohamed Nadjib Bouaziz, and Salah Hanini. "Influence of Non-Linear Boussinesq Approximation and Convective Thermal Boundary Condition on MHD Natural Convection Flow of a Couple Stress-Nanofluid in a Porous Medium." Nano Hybrids and Composites 26 (August 2019): 45–61. http://dx.doi.org/10.4028/www.scientific.net/nhc.26.45.

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Nonlinear density and temperature variation’s role (NDT) on the magnetohydrodynamic (MHD) natural convective flow of couple stress fluid with nanoparticles through a vertical porous channel modeled as Darcy-Forchheimer flow is the purpose of our work. The nanoparticles volume fraction is taken into consideration (Buongiorno model). The nonlinear partial differential equations governing this flow were transformed into ordinary differential equations via the similarity technique and simulated numerically using Matlab, following boundary value problem (BVP4c) code. Graphical illustrations, including non-dimensional velocity, temperature, concentration, nanoparticle’s concentration and numerical results containing Nusselt and Sherwood numbers were presented for different values of the non-linear part of the Boussinesq approximation; couple stress parameter, and the Biot number on the walls.

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Anwar, Muhammad Shoaib. "Numerical study of transport phenomena in a nanofluid using fractional relaxation times in Buongiorno model." Physica Scripta 95, no. 3 (February 4, 2020): 035211. http://dx.doi.org/10.1088/1402-4896/ab4ba9.

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O'Leary, Alan. "Dead Man Walking: The Aldo Moro kidnap and Palimpsest History in Buongiorno, notte." New Cinemas: Journal of Contemporary Film 6, no. 1 (April 8, 2008): 33–45. http://dx.doi.org/10.1386/ncin.6.1.33_1.

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Garoosi, Faroogh, Leila Jahanshaloo, and Saba Garoosi. "Numerical simulation of mixed convection of the nanofluid in heat exchangers using a Buongiorno model." Powder Technology 269 (January 2015): 296–311. http://dx.doi.org/10.1016/j.powtec.2014.09.009.

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Gajbhare, Bhimanand Pandurang, J. S. V. R. Krishnaprasad, and Satyaranjan Mishra. "Peristaltic flow of Buongiorno model nanofluids within a sinusoidal wall surface used in drug delivery." Heat Transfer 49, no. 2 (December 15, 2019): 1016–34. http://dx.doi.org/10.1002/htj.21651.

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Garoosi, Faroogh, Leila Jahanshaloo, Mohammad Mehdi Rashidi, Arash Badakhsh, and Mohammed E. Ali. "Numerical simulation of natural convection of the nanofluid in heat exchangers using a Buongiorno model." Applied Mathematics and Computation 254 (March 2015): 183–203. http://dx.doi.org/10.1016/j.amc.2014.12.116.

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Khan, J. A., M. Mustafa, T. Hayat, and F. Alzahrani. "Numerical study for Bödewadt flow of water based nanofluid over a deformable disk: Buongiorno model." Indian Journal of Physics 91, no. 5 (February 4, 2017): 527–33. http://dx.doi.org/10.1007/s12648-017-0959-5.

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47

S, Rajamani, Subramanyam Reddy Anala, Srinivas S, and Jagadeshkumar K. "Entropy Analysis on Pulsatile Flow of Couple Stress Nanofluid in a Vertical Channel: Buongiorno Nanofluid Model." ECS Transactions 107, no. 1 (April 24, 2022): 12273–84. http://dx.doi.org/10.1149/10701.12273ecst.

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The current work discloses the hydromagnetic flow of pulsating couple stress nanofluid in a vertical channel. The Buongiorno nanofluid model is employed in the present study with the entropy generation. The impressions of Ohmic and viscous dissipations, thermophoresis, thermal radiation, and Brownian motion are considered. The ruling partial differential equations are reduced into the set of ordinary differential equations by employing the perturbation method and then solved by utilizing the fourth order Runge-Kutta procedure with the support of shooting technique. The current concept is noteworthy in the field of energy conservation, dynamics of physiological fluids, and biomedicines. The influences of emerging parameters concerned with the current model on flow variables like velocity, temperature, and nanoparticle concentration are analyzed in detail and interpreted with pictorial illustrations.

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Selvaggi, Caterina. "Potere e affetti nel cinema di Marco Bellocchio fino a "Vincere": il contrappunto." PSICOBIETTIVO, no. 2 (March 2010): 157–78. http://dx.doi.org/10.3280/psob2009-002011.

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L'autore analizza alcuni celebri films di Marco Bellocchio ("L'ora di religione", "I pugni in tasca", "La balia", "Enrico IV", "Il principe di Homburg", "Il gabbiano", "Buongiorno notte" e "Vincere"), individuando lo stile espressivo del regista che privilegia l'opposizione e insieme riconosce il legame degli opposti, il contrappunto tra immagini e dialoghi, insieme a rumori e suoni. L'importanza della comunicazione non verbale che puň contrastare con l'immagine o con i dialoghi stessi, in particolare č rintracciata soprattutto nel rappresentare situazioni familiari complesse, simili in modo sorprendente a quelle che, nella terapia della famiglia, vengono considerate "famiglie invischiate". In particolare č in evidenza il rapporto tra potere e affetti che appare rapporto di opposizione tra le persone e si rivela perň anche rapporto di legame difficilmente scindibile.

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Makinde, Oluwole Daniel, and Adetayo Samuel Eegunjobi. "MHD FLOW OF A REACTING AND RADIATING NANOLIQUID PAST AN INCLINED HEATED PERMEABLE PLATE: ANALYSIS OF ENTROPY GENERATION." Latin American Applied Research - An international journal 51, no. 4 (September 30, 2021): 269–76. http://dx.doi.org/10.52292/j.laar.2021.715.

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This paper examines the aggregate impacts of magnetic field, thermophoresis, Brownian motion, variable viscosity, chemical reaction and radiative heat flux on the thermal putrefaction and immanent irreversibility of a channelling nanoliquid film flowing along with a slanted heated permeable plate. Following Buongiorno approach, the two-phase nanoliquid nonlinear model is obtained and addressed numerically using shooting technique as well as the Runge-Kutta- Fehlberg integration scheme. Effects of various emerging parameters on the overall flow structure with heat and mass transfer characteristics including entropy generation rate and Bejan number are displayed using diagrams and discussed. It is found that the entropy generation rate lessened with an upsurge in a magnetic field but heightened with an elevation in the buoyancy forces.

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Ellahi, Rahmat, Ahmed Zeeshan, Farooq Hussain, and A. Asadollahi. "Peristaltic Blood Flow of Couple Stress Fluid Suspended with Nanoparticles under the Influence of Chemical Reaction and Activation Energy." Symmetry 11, no. 2 (February 21, 2019): 276. http://dx.doi.org/10.3390/sym11020276.

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The present study gives a remedy for the malign tissues, cells, or clogged arteries of the heart by means of permeating a slim tube (i.e., catheter) in the body. The tiny size gold particles drift in free space of catheters having flexible walls with couple stress fluid. To improve the efficiency of curing and speed up the process, activation energy has been added to the process. The modified Arrhenius function and Buongiorno model, respectively, moderate the inclusion of activation energy and nanoparticles of gold. The effects of chemical reaction and activation energy on peristaltic transport of nanofluids are also taken into account. It is found that the golden particles encapsulate large molecules to transport essential drugs efficiently to the effected part of the organ.

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Journal articles on the topic 'Buongiorno'

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