Topic: Question about temperature, IST temperature and IST temperatureFlow

Dear all,
Recently I’m learning about the analysis of HeatTransfer. I get confused about two simple questions. I use "vtkxml tstep_all domain_all var 2 1 81 primvars 1 1 cellvars 1 1 81 stype 2" to output .vtu file. Questions as follow:
①What’s the differences between “temperature” and “IST temperature” ?The result.jpg  show the result. They are completely different in value and distribution.
② About the attribute of “IST temperatureFlow”. Does it refer to the propagation speed of heat in the three directions of XYZ?
Anyone can give me some tips?
Thanks a lot !

Re: Question about temperature, IST temperature and IST temperatureFlow

You have primary fields, which are the dofs, interpolated according to the FE-discretization (like displacements, temperature, concentration, velocity, pressure).

Then you also have values in each integration point, you have various fields related to the constitutive behavior. Like strains, stresses, heat flux etc.
In some cases, the primaryfields, interpolated at integrationpoints, like IST_Temperature.

For viewing the resulting temperature distribution, you should use primvars.