perturbU

Andela · April 12, 2016, 09:13

Hi everyone!

I would be grateful if someone can explain me how to use perturbU.
I checked on forum other's posts but I still don't know how to use it.

How can I add perturbation on interface between two fluids?
For now I just wmake it (perturbU for channel) and I added in transportProperties Ubar. That's all I do for now. Is there something other I must set before I can use perturbU?
Because after i try to use it i get this error:

From function regIOobject::readStream()
in file db/regIOobject/regIOobjectRead.C at line 73.

FOAM exiting

I am sorry on asking such question, but I am new to all this and I would really need some help.

Thank you...

Andela · April 14, 2016, 09:28

Ok, I figured it out how to use it. It's working.

Can somebody explain me what are and how can values in perturbUDict file be set up properly:
duPlus, betaplus alphaPlus, sigma, epsilon...?

calf.Z · December 4, 2018, 08:38

I am also interested in the meaning of the value in perturbudict，have you resolved it？Thank you.

April 12, 2016, 09:13	perturbU	#1
Andela New Member Marija Bervida Join Date: Mar 2016 Location: Slovenia Posts: 9 Rep Power: 10	Hi everyone! I would be grateful if someone can explain me how to use perturbU. I checked on forum other's posts but I still don't know how to use it. How can I add perturbation on interface between two fluids? For now I just wmake it (perturbU for channel) and I added in transportProperties Ubar. That's all I do for now. Is there something other I must set before I can use perturbU? Because after i try to use it i get this error: From function regIOobject::readStream() in file db/regIOobject/regIOobjectRead.C at line 73. FOAM exiting I am sorry on asking such question, but I am new to all this and I would really need some help. Thank you...

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April 14, 2016, 09:28		#2
Andela New Member Marija Bervida Join Date: Mar 2016 Location: Slovenia Posts: 9 Rep Power: 10	Ok, I figured it out how to use it. It's working. Can somebody explain me what are and how can values in perturbUDict file be set up properly: duPlus, betaplus alphaPlus, sigma, epsilon...?

December 4, 2018, 08:38		#3
calf.Z Senior Member Jianrui Zeng Join Date: May 2018 Location: China Posts: 157 Rep Power: 8	I am also interested in the meaning of the value in perturbudict，have you resolved it？Thank you.