Re: gas bubble in liquid with surface tension and viscosity
From: Uncle Al (UncleAl0_at_hate.spam.net)
Date: 07/18/04
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Date: Sat, 17 Jul 2004 19:12:40 -0500
Johannes wrote:
>
> I need to know how long a raising gas bubble in a very viscous liquid
> takes to reach the surface of the liquid. The assumptions should
> include the surface tension of the liquid to calculate the pressure
> and size of the bubble, and also the viscosity for laminar flow. The
> solubility of gas in the liquid can be assumed to be negligible. I
> assume that very small bubbles (<1um) may need many days in a bottle
> of very viscous gel like liquid. I would appreciate if anybody has a
> solution for this problem.
If it is a very small bubble you might start with Stokes
equation, having it fall up (boyancy).
http://www.processassociates.com/process/separate/termvel.htm
terminal velocity calculator
http://www.scri.fsu.edu/~jac/Physics/drag/
aerodynamic drag
-- Uncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) http://www.mazepath.com/uncleal/qz.pdf
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