Which solver required for humidity and temperature distributiion

Sandy7 · January 11, 2017, 15:47

Hello Star CCM+ user,

I have just stared using the star CCM+ and interested to find the humidity and temperature distribution in a house model..

can someone clear my following questions.

Question regarding humidity calculations..

1. Material used air, constant density(I am wondering where I can enter the properties for humidity)

2. which solver is required for calculating the humidity (passive solver? or any other)

Question regarding the temperature distribution:

1. Which solver is required in order to calculate the temperature distribution in a building?

Will appreciate any help!

Sandy

me3840 · January 20, 2017, 01:33

You want to use multi-component gas and have an air and a water vapor component. You probably don't want constant density if you intend on doing something in a room, especially where natural convection will dominate. You will most likely want the ideal gas equation of state.

I'm not sure what you mean by solver required for humidity and temperature, any of the solvers will do it. You just have to add the temperature model on to the physics.

I would suggest you do a few tutorials before you hop in to doing your own work.

armins · January 25, 2017, 02:17

This is the same problem that I have. I have used Ideal gas for it. It seems good from the first iteration. however, it won't converge and the humidity will increase up to maximum amount in everywhere. Please let me know your kind comment.

January 11, 2017, 15:47	Which solver required for humidity and temperature distributiion	#1
Sandy7 New Member Sandy Join Date: Dec 2016 Posts: 10 Rep Power: 9	Hello Star CCM+ user, I have just stared using the star CCM+ and interested to find the humidity and temperature distribution in a house model.. can someone clear my following questions. Question regarding humidity calculations.. 1. Material used air, constant density(I am wondering where I can enter the properties for humidity) 2. which solver is required for calculating the humidity (passive solver? or any other) Question regarding the temperature distribution: 1. Which solver is required in order to calculate the temperature distribution in a building? Will appreciate any help! Sandy

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January 20, 2017, 01:33		#2
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	You want to use multi-component gas and have an air and a water vapor component. You probably don't want constant density if you intend on doing something in a room, especially where natural convection will dominate. You will most likely want the ideal gas equation of state. I'm not sure what you mean by solver required for humidity and temperature, any of the solvers will do it. You just have to add the temperature model on to the physics. I would suggest you do a few tutorials before you hop in to doing your own work.

January 25, 2017, 02:17		#3
armins New Member Armin Join Date: Jan 2017 Posts: 4 Rep Power: 9	This is the same problem that I have. I have used Ideal gas for it. It seems good from the first iteration. however, it won't converge and the humidity will increase up to maximum amount in everywhere. Please let me know your kind comment.