[taner]

Dear all,

kinematic viscosity "nu" can be modified during the runtime by changing its value in the "transportProperties" dictionary.
Is there a simple way to change its value within the time loop?
I would like to define it as a function of time/iterations in a SIMPLE solver to improve convergence like:

while (runTime.loop())
{

if ( current_time <= some_fixed_time )
{
nu = nu_desired * ( some_fixed_time / current_time );
}
else
{
nu = nu_desired;
}

...

}

so that it reaches to the desired value after some fixed time. I would appreciate any proposal to implement it in an elegant way.

Thanks in advance
Taner.