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ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561
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STUDY OF CONVECTIVE HEAT TRANSFER IN A SQUARE CAVITY FILLED WITH A VISCOPLASTIC FLUID BY TAKING INTO ACCOUNT VISCOUS DISSIPATION
Краткое описание
The present work is devoted to the numerical study of forced, natural and mixed convective heat transfer inside a square cavity filled with a non-Newtonian viscoplastic fluid described by the Bingham rheological model. The upper and bottom walls of the enclosure are thermally insulated, while the remaining walls are mobile and differentially heated. In order to solve the general
coupled equations, a code based on the finite volume method is used and has been validated after comparison of the present results with those from the literature.
Viscous dissipation effects on hydrodynamic and thermal properties are analyzed for various values of the Richardson number. The results show that the Richardson number affects the hydrodynamic characteristics as well as heat transfer in a cavity filled with a viscoplastic fluid and leads to a flow structure modification different from that obtained for a Newtonian fluid. The same observation is done concerning the effect of the Brinkman number. Indeed, it has been noted that neglecting the viscous dissipation results in a significant underestimation of heat transfer in an enclosure, especially in the case of natural heat transfer convection.
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Ragui Karim, Boutra Abdelkader, Bennacer Rachid, Khaled Benkahla Youb, Progress on numerical simulation of yield stress fluid flows (Part I): Correlating thermosolutal coefficients of Bingham plastics within a porous annulus of a circular shape, International Journal of Heat and Mass Transfer, 126, 2018. Crossref
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Labsi Nabila, Benkahla Youb Khaled, Boutra Abdelkader, Titouah Meriem, Convection heat transfer inside a lid-driven cavity filled with a shear-thinning Herschel–Bulkley fluid, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 40, 3, 2018. Crossref
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Kherroubi Seddik, Benkahla Youb Khaled, Boutra Abdelkader, Bensaci Abdelghani, Two- and three-dimensional comparative study of heat transfer and pressure drop characteristics of nanofluids flow through a ventilated cubic cavity (part II: non-Newtonian nanofluids under the influence of a magnetic field), Journal of Thermal Analysis and Calorimetry, 147, 2, 2022. Crossref