[Audrius]

Dear colleagues,

I have question for You. I have been analyzing water expansion in 2D closed domain (0.2 m x 0.2 m). The left wall of square are 370 K, the right wall is 277.15 K, other walls are isolated. Initial water temperature is 277.15 K. Initial pressure 101325 Pa. I use this setup:
Pressure based solver
Transient time solver
Gravity -9.81
Operating pressure 101325
Operating density 0
Piso for pressure-velocity coupling
PRESTO! for pressure spatial discretization
Etc….

For water properties, I have used this setup:
1. Piecewice-linear for density; constant properties for other parameters. Conclusion: velocity field looks normal, residuals reach convergence criteria, and density changes are visible. However, there is no pressure rise in the domain.
2. Piecewise-linear for all water properties. Conclusion: results are the same as in the 1 case.
3. Compressible-liquid for water density; constant properties for other parameters. Conclusion unrealistic velocity, temperature, density, pressure fields and etc. There is no pressure rise in the domain.

How to create the setup, that pressure in the domain will be function of water volume/density?

Please, find the attached case file of my task.



Thank You.

Kind regards,
Audrius

[sankalpjain]

Can you please tell me which piecewise polynomial you used for the variation of density of water. I am doing a geometrically similar case in 3D. I actually have closed 3d tubes instead of square.

I am unable to get the velocity field in my case. Maybe because I have provided the density as constant. Can you please tell me how to provide a temperature dependent density.

[sankalpjain]

Can you please tell me which piecewise polynomial you used for the variation of density of water. I am doing a geometrically similar case in 3D. I actually have closed 3d tubes instead of square.

I am unable to get the velocity field in my case. Maybe because I have provided the density as constant. Can you please tell me how to provide a temperature dependent density.

[Audrius]

Piecewise-linear