Density or Pressure based solver

Achu · April 26, 2018, 20:22

Hi,

I'm trying to do a liquid heating problem.

I have liquid density change, specific heat change and viscosity change as a function of temperature.

I'm confused if I should use Pressure based solver or Density based solver for the liquid heating problem.

I tried using Pressure based solver, but at a certain point in my simulation I get floating point error. This is not due to time stepping problem.

Could someone tell me what solver I should use?

LuckyTran · April 27, 2018, 04:34

Both should work out of the box. The pressure based solver is probably the better choice though since your case is incompressible.

You probably just need to tinker with your setup to figure out why it's diverging.

April 26, 2018, 20:22	Density or Pressure based solver	#1
Achu New Member Ashwin Join Date: Feb 2017 Posts: 4 Rep Power: 9	Hi, I'm trying to do a liquid heating problem. I have liquid density change, specific heat change and viscosity change as a function of temperature. I'm confused if I should use Pressure based solver or Density based solver for the liquid heating problem. I tried using Pressure based solver, but at a certain point in my simulation I get floating point error. This is not due to time stepping problem. Could someone tell me what solver I should use?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How is the accuracy using VOF (pressure based solver) on supersonic flow	air_fun	Fluent Multiphase	1	August 25, 2021 00:59
Boundary face values in density based solver?	Chen Zhi	FLUENT	3	November 28, 2019 06:51
[ANSYS Meshing] Help with element size	sandri_92	ANSYS Meshing & Geometry	14	November 14, 2018 07:54
static vs. total pressure	auf dem feld	FLUENT	17	February 26, 2016 13:04
Using Density Gradient C_R_G(c,t), Pressure Based Solver	Anirudh_Deodhar	Fluent UDF and Scheme Programming	1	October 25, 2013 05:43

April 27, 2018, 04:34		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,676 Rep Power: 66	Both should work out of the box. The pressure based solver is probably the better choice though since your case is incompressible. You probably just need to tinker with your setup to figure out why it's diverging.