p_rgh in interFoam 2.1.1

tayo · September 19, 2012, 21:02

Greetings,

I'm using OF 2.1.1. From previous trends, I've learnt that p_rgh was newly introduced from OF 1.7 and pressure was modified and computed as p_rgh = p - rho*gh in a number of OF solvers including interFoam. I'm using interFoam for my case and I need pressure gradient to cause air bubble rise in a liquid. How do I include this rho*gh to my simulation. I tried using some BC, but no success for now. Without this gradient, my bubble just free falls.Do I need to modify the solver? Is there another easier way using BC? Anticipating your reply. Thank you.

tayo · September 20, 2012, 19:07

All right, problem fixed. And p_rgh in OF 2.1.1 is not a problem (atleaast not for the case I run) and it does not impede buoyancy either.

akidess · September 21, 2012, 06:39

It is likely that at some point in the future, someone will find this thread and get angry at you for not explaining how you fixed your problem

tayo · September 21, 2012, 13:51

Quote:

Originally Posted by akidess

It is likely that at some point in the future, someone will find this thread and get angry at you for not explaining how you fixed your problem

Sorry to take your time, it was my fault. I unknowingly inserted liquid inside my bubble and air as the surrounding. Of course, it should sink irrespective of the buoyancy.

September 19, 2012, 21:02	p_rgh in interFoam 2.1.1	#1
tayo Member Tayo Join Date: Aug 2012 Posts: 94 Rep Power: 14	Greetings, I'm using OF 2.1.1. From previous trends, I've learnt that p_rgh was newly introduced from OF 1.7 and pressure was modified and computed as p_rgh = p - rhogh in a number of OF solvers including interFoam. I'm using interFoam for my case and I need pressure gradient to cause air bubble rise in a liquid. How do I include this rhogh to my simulation. I tried using some BC, but no success for now. Without this gradient, my bubble just free falls.Do I need to modify the solver? Is there another easier way using BC? Anticipating your reply. Thank you. Last edited by tayo; September 19, 2012 at 21:56.

September 21, 2012, 06:39		#3
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 30	It is likely that at some point in the future, someone will find this thread and get angry at you for not explaining how you fixed your problem __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

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September 20, 2012, 19:07		#2
tayo Member Tayo Join Date: Aug 2012 Posts: 94 Rep Power: 14	All right, problem fixed. And p_rgh in OF 2.1.1 is not a problem (atleaast not for the case I run) and it does not impede buoyancy either.