Expression Quesitons

Ineedyourhelp · May 24, 2016, 23:01

Hey, Guys. anyone can solve my problem? Thanks.
In my model, there is a tank which is full of water,and the height of tank is h. I put some salt into the water. The distribution of salt is not uniform, so the concentrations of salt in the different heights(0-h) is also different. I want to use a equation in CFX source, and the equation is S=H*C.
C is the mass fraction of salt, and I can use mf.salt to describe it.
But how to describe the "H", H is the height from tank bottom to tank top. "H" is the integration process. Can I use the Expression to describe this H?

ghorrocks · May 25, 2016, 01:57

If the bottom of the tank is at z=0, then H=z. Isn't that obvious?

May 24, 2016, 23:01	Expression Quesitons	#1
Ineedyourhelp New Member Bohong.Zhu Join Date: Mar 2016 Posts: 6 Rep Power: 10	Hey, Guys. anyone can solve my problem? Thanks. In my model, there is a tank which is full of water,and the height of tank is h. I put some salt into the water. The distribution of salt is not uniform, so the concentrations of salt in the different heights(0-h) is also different. I want to use a equation in CFX source, and the equation is S=H*C. C is the mass fraction of salt, and I can use mf.salt to describe it. But how to describe the "H", H is the height from tank bottom to tank top. "H" is the integration process. Can I use the Expression to describe this H?

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May 25, 2016, 01:57		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	If the bottom of the tank is at z=0, then H=z. Isn't that obvious?