Mohammed Boukendil
ABSTRACT
In this paper, the finite volume method is combined with the discrete ordinate method to study numerically the natural convection coupled to surface radiation in a square cavity with an elliptic inner cylinder maintained at a high temperature TH. The cavity is filled with air and cooled symmetrically by its vertical sidewalls maintained at a cold temperature TC. The hydrodynamic and thermal behaviors of the fluid and the convective and radiative heat transfer are investigated for the Rayleigh number ranging from 103 to 107 and different surface emissivities. The numerical work is carried out using an in-house CFD code written in FORTRAN. It is found that the surface radiation accentuates the convective and total heat transfer in the cavity.
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Cross Ref
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- Kefayati, GH.R. and Tang, H. 2018a. Lattice Boltzmann simulation of viscoplastic fluids on natural convection in an inclined enclosure with inner cold circular/elliptical cylinders (Part I: One cylinder). International Journal of Heat and Mass Transfer. 123, (Aug. 2018), 1138--1162. Google ScholarCross Ref
- Kefayati, GH.R. and Tang, H. 2018b. Lattice Boltzmann simulation of viscoplastic fluids on natural convection in inclined enclosure with inner cold circular/elliptical cylinders (Part II: Two cylinders). International Journal of Heat and Mass Transfer. 123, (Aug. 2018), 1163--1181. Google ScholarCross Ref
- Kefayati, GH.R. and Tang, H. 2018c. Lattice Boltzmann simulation of viscoplastic fluids on natural convection in inclined enclosure with inner cold circular/elliptical cylinders (Part III: Four cylinders). International Journal of Heat and Mass Transfer. 123, (Aug. 2018), 1182--1203. Google ScholarCross Ref
- Ravnik, J. and Škerget, L. 2015. A numerical study of nanofluid natural convection in a cubic enclosure with a circular and an ellipsoidal cylinder. International Journal of Heat and Mass Transfer. 89, (Oct. 2015), 596--605. Google ScholarCross Ref
- Sheikholeslami, M., Hayat, T., Muhammad, T. and Alsaedi, A. 2018. MHD forced convection flow of nanofluid in a porous cavity with hot elliptic obstacle by means of Lattice Boltzmann method. International Journal of Mechanical Sciences. 135, (Jan. 2018), 532--540. Google ScholarCross Ref
- Munshia, M.J.H., Alimb, M.A., Bhuiyanb, A.H. and Ali, M. 2017. Hydrodynamic mixed convection in a lid- driven square cavity including elliptic shape heated block with corner heater. Procedia Engineering. 194, 442--449. Google ScholarCross Ref
Index Terms
- Surface radiation and unsteady natural convection induced by a heated elliptic cylinder inside a symetrically cooled cavity
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