TY - JOUR
T1 - Radiative-convective heat transfer in vertcal channels
AU - Thangam, Siva
AU - Cesmebasi, Erol
PY - 1996
Y1 - 1996
N2 - The convective stability of a radiating fluid between two infinitely long rigid vertical plates which are maintained at different isothermal temperatures is considered. The radiative transport is modeled using Eddington approximation including the weighted effect of nongrayness of the fluid. A linear stability analysis is performed wherein the disturbance equations are solved using a Galerkin procedure for both opaque and transparent boundaries. In the case of opaque boundaries, the steady motion is a function of the Planck number, optical thickness, plate emissivities and the weighted nongrayness of the fluid; and the radiative exchange between the plates tends to suppress the onset of buoyancy driven convective motion. When one boundary is made transparent, with the exclusion of the optically thin range, the added effect of the transmitted portion of the source radiation is found to considerably reduce the critical Rayleigh number and initiate overstable mode.
AB - The convective stability of a radiating fluid between two infinitely long rigid vertical plates which are maintained at different isothermal temperatures is considered. The radiative transport is modeled using Eddington approximation including the weighted effect of nongrayness of the fluid. A linear stability analysis is performed wherein the disturbance equations are solved using a Galerkin procedure for both opaque and transparent boundaries. In the case of opaque boundaries, the steady motion is a function of the Planck number, optical thickness, plate emissivities and the weighted nongrayness of the fluid; and the radiative exchange between the plates tends to suppress the onset of buoyancy driven convective motion. When one boundary is made transparent, with the exclusion of the optically thin range, the added effect of the transmitted portion of the source radiation is found to considerably reduce the critical Rayleigh number and initiate overstable mode.
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M3 - Article
AN - SCOPUS:0030394963
SN - 0272-5673
VL - 325
SP - 95
EP - 101
JO - American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
JF - American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
ER -