Changing Viscosity in solver

mostanad · March 3, 2021, 00:36

Hi all,
I am working on the viscosity value in a multiphase solver. Due to some modifications, I need to change the viscosity value in the solver using a function in my defined class. So I used the following line to access the viscosity and change it.

Code:

volScalarField k_viscosity = turbulence->nu();
particleCloud.setParticleViscosity(k_viscosity);

However, by these lines, only the k_viscosity value is changed using call by reference in setParticleViscosity function. So how can give the modified k_viscosity to nu? I think that's a big question I couldn't find its answer.
Cheers,

Mohammad

mostanad · March 3, 2021, 17:55

So interesting nobody knows the answer!

mostanad · March 3, 2021, 20:28

Finally solved the problem by myself using a function, correctnu, like correct(), to update the viscosity in each time step.

March 3, 2021, 00:36	Changing Viscosity in solver	#1
mostanad Senior Member mohammad Join Date: Sep 2015 Posts: 274 Rep Power: 11	Hi all, I am working on the viscosity value in a multiphase solver. Due to some modifications, I need to change the viscosity value in the solver using a function in my defined class. So I used the following line to access the viscosity and change it. Code: volScalarField k_viscosity = turbulence->nu(); particleCloud.setParticleViscosity(k_viscosity); However, by these lines, only the k_viscosity value is changed using call by reference in setParticleViscosity function. So how can give the modified k_viscosity to nu? I think that's a big question I couldn't find its answer. Cheers, Mohammad

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March 3, 2021, 17:55		#2
mostanad Senior Member mohammad Join Date: Sep 2015 Posts: 274 Rep Power: 11	So interesting nobody knows the answer!

March 3, 2021, 20:28		#3
mostanad Senior Member mohammad Join Date: Sep 2015 Posts: 274 Rep Power: 11	Finally solved the problem by myself using a function, correctnu, like correct(), to update the viscosity in each time step.