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100 _a20171211a2017 k y0engy50 ba
101 0 _aeng
102 _aDE
135 _adrcn ---uucaa
181 0 _ai
182 0 _ab
200 1 _aOnset of double-diffusive convection of a sparsely packed micropolar fluid in a porous medium layer saturated with a nanofluid
_fJa. C. Umavathi, M. A. Sheremet
203 _aText
_celectronic
300 _aTitle screen
320 _a[References: 43 tit.]
330 _aThe onset of convection of a sparsely packed micropolar fluid in a porous medium layer saturated by a nanofluid is examined by using a linear and nonlinear stability analyses. The Darcy–Brinkman–Forchheimer model is employed for the porous medium layer. The model used for the nanofluid incorporates the effects of Brownian motion and thermophoresis. The critical Rayleigh number, wave number for stationary and oscillatory modes and frequency of oscillations are obtained analytically using linear theory, and the nonlinear analysis is made with minimal representation of the truncated Fourier series analysis involving only two terms. The effect of various parameters on the stationary and oscillatory convections is shown pictorially. The dependence of stationary or oscillatory convection on the porous parameter and parameters involved in micropolar fluids is also discussed. We also study the effect of time on transient Nusselt number and Sherwood number which are found to be oscillatory when time is small. However, when time becomes very large, both the transient Nusselt value and Sherwood value approach to their steady-state values.
333 _aРежим доступа: по договору с организацией-держателем ресурса
461 _tMicrofluidics and Nanofluidics
_d2004-
463 _tVol. 21, iss. 7
_v[22 p.]
_d2017
610 1 _aэлектронный ресурс
610 1 _aтруды учёных ТПУ
610 1 _aRayleigh-Benard convection
610 1 _amicropolar fluids
610 1 _aDarcy-Brinkman-Forchheimer model
610 1 _aporous medium
610 1 _aконвекция Релея-Бенара
610 1 _aмикрополярные жидкости
610 1 _aпористые среды
700 1 _aUmavathi
_bJa. C.
_gJawali
701 1 _aSheremet
_bM. A.
_cphysicist
_cAssociate Professor of Tomsk Polytechnic University, Candidate of physical and mathematical sciences
_f1983-
_gMikhail Aleksandrovich
_2stltpush
_3(RuTPU)RU\TPU\pers\35115
712 0 2 _aНациональный исследовательский Томский политехнический университет (ТПУ)
_bЭнергетический институт (ЭНИН)
_bКафедра атомных и тепловых электростанций (АТЭС)
_h118
_2stltpush
_3(RuTPU)RU\TPU\col\18683
801 2 _aRU
_b63413507
_c20171211
_gRCR
856 4 _uhttps://doi.org/10.1007/s10404-017-1965-9
942 _cCF