1. Natural convection;Raithby,1985
2. Typical heat transfer and flow regimes in the induced mixed convection phenomenon;Weiss,1998
3. Theoretical considerations on free convection in tubes;Lighthill;Quarterly Journal of Mechanics and Applied Mathematics,1953
4. On the stagnation of natural-convection flows in closed-end tubes;Ostrach;Transactions of the American Society of Mechanical Engineers,1958
5. R.C. Ward, Principles of Hydrology, McGraw-Hill, London, 1975, p. 32.