Authors: Chang Kyun Choi Joung Hwan Park Min Chan Kim
Publish Date: 2004/07/27
Volume: 41, Issue: 2, Pages: 155-162
Abstract
The onset of buoyancydriven convection in an initially isothermal quiescent fluid layer experiencing evaporative cooling from above is analyzed under linear theory Based on propagation theory the selfsimilar stability equations are forced The dimensionless critical time τ c to mark the onset of convective instability is presented as a function of the Rayleigh number Raq and the Prandtl number Pr The present model predicts that τ c decreases with increasing Pr for a given Raq When the temporal growth rate of disturbances is considered the present predictions compare reasonably well with existing experimental data of water It seems that for large Pr manifest convection is detected at a certain time τ ≅ 4τ c
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