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time averaged drag on a sphere

Posted Jun 4, 2010, 1:01 p.m. EDT 2 Replies

Ozgur
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I would like to calculate time averaged drag on a sphere being pulled (or falling) through a tube of non-uniform walls (such as a corrugated tube) which otherwise contains a stationary fluid. There may be several ways to model this and many complications related to the relative motion between the sphere and the walls but I wanted to ask to draw from everyone's experience, at a high level what would be your approach and why?

Thanks,
Ozgur
2 Replies Last Post Jun 4, 2010, 2:27 p.m. EDT
Danial Tz
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Posted: 1 decade ago Jun 4, 2010, 2:23 p.m. EDT
something like the falling sand example in Comsol?
something like the falling sand example in Comsol?
Ozgur
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Posted: 1 decade ago Jun 4, 2010, 2:27 p.m. EDT
yes I am aware of this one, but it circumvents a lot of the mesh challenges in my problem by having a smooth wall so all the relative motion can be accounted for through a simple wall velocity BC. In my case the walls are not uniform.


something like the falling sand example in Comsol?


yes I am aware of this one, but it circumvents a lot of the mesh challenges in my problem by having a smooth wall so all the relative motion can be accounted for through a simple wall velocity BC. In my case the walls are not uniform. [QUOTE] something like the falling sand example in Comsol? [/QUOTE]

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