Publicado 12 números por año
ISSN Imprimir: 1091-028X
ISSN En Línea: 1934-0508
Indexed in
THE ONSET OF TRANSIENT SORET-DRIVEN BUOYANCY CONVECTION IN NANOPARTICLE SUSPENSIONS WITH PARTICLE-CONCENTRATION-DEPENDENT VISCOSITY IN A POROUS MEDIUM
SINOPSIS
The onset of transient Soret-driven convection in a horizontal layer of a porous medium saturated by a fluid with nanoparticles suspensions, which is heated from above, is studied where the viscosity depends on the local concentration of nanoparticles of practical importance. For the case of high solutal Darcy-Rayleigh number RsD with a large negative Soret coefficient DT, the applied even small temperature on the upper boundary creates Soret diffusion and then the convective motion occurs during the transient diffusion stage. In conjunction with the Soret diffusion, the nanoparticle concentration becomes stratified as given by Eq. (22), and hence the viscosity is stratified. The nanofluid is considered to be dilute, i.e., the volume concentrations of nanoparticles is very small 0.01%−2.0%, and this permits the porous medium to be taken as a weakly heterogeneous medium with variation in the vertical direction of viscosity. In turn this allows an approximate analytical solution to be obtained using a spectral method. The critical times of the onset of this Soret-driven convection are obtained as a function of the modified solute Rayleigh-Darcy number Rs*D for different values of viscosity variation parameter Q. Decreasing Q can enhanced these times Q. The results from theory are also compared with the experimental results. We show that the results from the theoretical predictions are too close to explain the experimental work.
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Yadav Dhananjay, Nam Donglim, Lee Jinho, The onset of transient Soret-driven MHD convection confined within a Hele-Shaw cell with nanoparticles suspension, Journal of the Taiwan Institute of Chemical Engineers, 58, 2016. Crossref
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Yadav Dhananjay, Lee Jinho, Cho Hyung Hee, Brinkman convection induced by purely internal heating in a rotating porous medium layer saturated by a nanofluid, Powder Technology, 286, 2015. Crossref
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Yadav Dhananjay, Mohamed R.A., Lee Jinho, Cho Hyung Hee, Thermal convection in a Kuvshiniski viscoelastic nanofluid saturated porous layer, Ain Shams Engineering Journal, 8, 4, 2017. Crossref
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Yadav Dhananjay, Numerical Solution of the Onset of Natural Convection in a Rotating Nanofluid Layer Induced by Purely Internal Heating, International Journal of Applied and Computational Mathematics, 3, 4, 2017. Crossref
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Akbarzadeh Pooria, The onset of MHD nanofluid convection between a porous layer in the presence of purely internal heat source and chemical reaction, Journal of Thermal Analysis and Calorimetry, 131, 3, 2018. Crossref
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Yadav Dhananjay, Wang Junye, Convective Heat Transport in a Heat Generating Porous Layer Saturated by a Non-Newtonian Nanofluid, Heat Transfer Engineering, 40, 16, 2019. Crossref
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ŞAHİN Fevzi, NAMLI Lütfü, NANOAKIŞKANLARDA KARARLILIĞIN ISI TRANSFERİNİ İYİLEŞTİRME AÇISINDAN ÖNEMİ, Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi, 2018. Crossref
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Akbar Y., Abbasi F. M., Irreversibility analysis of nanofluid flow induced by peristaltic waves in the presence of concentration‐dependent viscosity, Heat Transfer, 50, 6, 2021. Crossref
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Salahuddin T, Khan Mair, Alharbi Sayer Obaid, Chu Yu-Ming, Internal energy change in Darcy-Forchheimer Carreau fluid model past a vertical stretching sheet with magnetic dipole and variable thermo-physical properties, Physica Scripta, 96, 2, 2021. Crossref