Variable viscosity effects on the onset of convection in porous media
- 1 December 1975
- journal article
- Published by AIP Publishing in Physics of Fluids
- Vol. 18 (12), 1649-1651
- https://doi.org/10.1063/1.861083
Abstract
The onset of convection in a horizontal, isotropic, water‐saturated porous medium is considered. The temperature difference between the top and bottom is as large as 250 °C. The effects of an eightfold variation in kinematic viscosity are included. The critical Rayleigh number is found to be substantially reduced from the classical value although the associated wavenumber is nearly the same. Neutral mode streamline and isotherm patterns are considerably distorted in the vertical direction in distinction to the symmetric patterns found in the constant viscosity classical calculation.Keywords
This publication has 4 references indexed in Scilit:
- Large amplitude convection in porous mediaJournal of Fluid Mechanics, 1974
- Criterion for the onset of convective flow in a fluid in a porous mediumInternational Journal of Heat and Mass Transfer, 1967
- Steady state free thermal convection of liquid in a saturated permeable mediumJournal of Fluid Mechanics, 1957
- Convection of a fluid in a porous mediumMathematical Proceedings of the Cambridge Philosophical Society, 1948