[alimea]

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

[cyw]

Originally Posted by alimea

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!

[alimea]

Originally Posted by cyw

Have you solved this problem? Thank you!

According to my searches, drag should be calculated using force balance on bubble.

regards

[cyw]

Originally Posted by alimea

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?

[alimea]

Originally Posted by cyw

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.

Regards