Radiation effect on natural convection over a vertical cylinder embedded in porous media
- Air Force Aeronautical and Technical School, Kaohsiung (Taiwan, Province of China). Dept. of General Course
Study of buoyancy-induced convection flow and heat transfer in a fluid-saturated porous medium has recently attracted considerable interest because of a number of important energy-related engineering and geophysical applications such as thermal insulation of buildings, geothermal engineering, enhanced recovery of petroleum resources, filtration processes, ground water pollution and sensible heat storage beds. In this paper numerical solutions are presented for the effect of radiation on natural convection about an isothermal vertical cylinder embedded in a saturated porous medium. These partial differential equations are transformed into the nonsimilar boundary layer equations which are solved by an implicit finite-difference method (Keller box method). Numerical results for the dimensionless temperature profiles and the local Nusselt number are presented for the transverse curvature parameter {xi}, conduction-radiation parameter R{sub d} and surface temperature excess ratio H. In general, the local Nusselt number increases as the transverse curvature parameter {xi} increases. Furthermore, decreasing the conduction-radiation parameter R{sub d} and increasing surface temperature excess ratio H augments the local heat transfer rate.
- OSTI ID:
- 334086
- Journal Information:
- International Communications in Heat and Mass Transfer, Journal Name: International Communications in Heat and Mass Transfer Journal Issue: 2 Vol. 26; ISSN 0735-1933; ISSN IHMTDL
- Country of Publication:
- United States
- Language:
- English
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