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Ehteram, H. R., Abbasian Arani, A. A., Sheikhzadeh, G. A., Aghaei, A., Malihi, A. R.. (1394). The effect of various conductivity and viscosity models considering Brownian motion on nanofluids mixed convection flow and heat transfer. نشریه علمی دانشگاه سیستان و بلوچستان, 4(1), 19-28. doi: 10.7508/tpnms.2016.01.003
H. R. Ehteram; A. A. Abbasian Arani; G. A. Sheikhzadeh; A. Aghaei; A. R. Malihi. "The effect of various conductivity and viscosity models considering Brownian motion on nanofluids mixed convection flow and heat transfer". نشریه علمی دانشگاه سیستان و بلوچستان, 4, 1, 1394, 19-28. doi: 10.7508/tpnms.2016.01.003
Ehteram, H. R., Abbasian Arani, A. A., Sheikhzadeh, G. A., Aghaei, A., Malihi, A. R.. (1394). 'The effect of various conductivity and viscosity models considering Brownian motion on nanofluids mixed convection flow and heat transfer', نشریه علمی دانشگاه سیستان و بلوچستان, 4(1), pp. 19-28. doi: 10.7508/tpnms.2016.01.003
Ehteram, H. R., Abbasian Arani, A. A., Sheikhzadeh, G. A., Aghaei, A., Malihi, A. R.. The effect of various conductivity and viscosity models considering Brownian motion on nanofluids mixed convection flow and heat transfer. نشریه علمی دانشگاه سیستان و بلوچستان, 1394; 4(1): 19-28. doi: 10.7508/tpnms.2016.01.003

The effect of various conductivity and viscosity models considering Brownian motion on nanofluids mixed convection flow and heat transfer

Challenges in Nano and Micro Scale Science and Technology
مقاله 3، دوره 4، شماره 1، فروردین 2016، صفحه 19-28    اصل مقاله (373.83 K)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.7508/tpnms.2016.01.003
نویسندگان
H. R. Ehteram؛ A. A. Abbasian Arani؛ G. A. Sheikhzadeh؛ A. Aghaei؛ A. R. Malihi*
Department of Mechanical Engineering, Mechanical Engineering University of Kashan, Kashan, I. R. Iran
چکیده
 In this paper the effect of using various models for conductivity and viscosity considering Brownian motion of nanoparticles is investigated. This study is numerically conducted inside a cavity full of Water-Al2O3 nanofluid at the case of mixed convection heat transfer. The effect of some parameters such as the nanoparticle volume fraction, Rayleigh, Richardson and Reynolds numbers has been examined. The governing equations with specified boundary conditions has been solved using finite volume method. A computer code has been prepared for this purpose. The results are presented in form of stream functions, isotherms, Nusselt number and the flow power with and without the Brownian motion taken into consideration. The results show that for all the applied models the stream functions and isotherm have approximately same patterns and no considerable difference has been observed. In all the studied models when considering the Brownian motion, the average Nusselt number is higher than not taking this effect into account. The models of Koo-Kleinstreuer and Li-Kleinstreuer give almost same values for the maximum stream function and average Nusselt number. It is also true about the models of Vajjha-Das and Xiao et al. 
کلیدواژه‌ها
Brownian motion؛ Mixed convection؛ Nanofluid؛ Numerical study؛ Variable properties
مراجع

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