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calculation of drag force for a bubble

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Old   February 11, 2018, 09:19
Default calculation of drag force for a bubble
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Hi every body
I want to calculate drag coefficient that is applied to a bubble which arises in a liquid. You know that forceCoeff code is for a boundary patch.

Thanks
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Old   August 30, 2019, 07:26
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Quote:
Originally Posted by alimea View Post
Hi every body
I want to calculate drag coefficient that is applied to a bubble which arises in a liquid. You know that forceCoeff code is for a boundary patch.

Thanks
Have you solved this problem? Thank you!
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Old   August 30, 2019, 13:21
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Originally Posted by cyw View Post
Have you solved this problem? Thank you!
According to my searches, drag should be calculated using force balance on bubble.

regards
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Old   August 30, 2019, 16:46
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Quote:
Originally Posted by alimea View Post
According to my searches, drag should be calculated using force balance on bubble.

regards
Thank you for your message. Could you tell me more? Which forces are in balance?
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Old   August 31, 2019, 03:34
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Originally Posted by cyw View Post
Thank you for your message. Could you tell me more? Which forces are in balance?
You can find the Terminal velocity of the bubble using the balance of all of the forces applied to it, such as gravity, buoyancy, drag ,... . Finally the drag force can be found with Terminal velocity.

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