Assign the region to be filled with water

billue123 · May 14, 2013, 15:45

Hey guys,
I am modelling a gas water heater in ansys. the problem i am facing is that i am unable to assign my water region to be initially been filled with water so that when my hot flue gases flow through the vent it heats the water. i can only assign mass flow rate to water inlet rather than assign the water cell zone being filled with water.
Kindly please help

RodriguezFatz · May 15, 2013, 08:21

At "Solution Initialization" after initializing click on the "Patch..." button. Here you can set the volume fraction of the water phase to "1" in the relevant zones.

billue123 · May 15, 2013, 08:29

i tried but the only variable that comes are pressure, x velocity , y velocity and temperature. what must i do?

billue123 · May 15, 2013, 08:33

the option of volume of fraction comes when i use multiphase but my model is not a multiphase problem instead 2 fluids separated by a wall

RodriguezFatz · May 15, 2013, 08:33

Firstly select the relevant phase in the small drop-down-menu on the left. It is set to "mixture" by default, but of course you can not set the volume fraction of the mixture.

RodriguezFatz · May 15, 2013, 08:34

Ahh ok, you don't have a multiphase problem, but two different cell zones with different fluids?

billue123 · May 15, 2013, 08:36

yeah that is right. one of the cell zone which is water is filled at start. the second zone is of flue gases which heats the water. how do i set my water cell zone as filled with water at initial stage

RodriguezFatz · May 15, 2013, 08:42

I never did that but under "Cell Zone Conditions" -> "Edit" you chose the material of each zone. Isn't that sufficient?

billue123 · May 15, 2013, 08:44

that assigns the zone with a particular fluid but it doesn't fill it with one..just provide the zone with those fluid properties.

RodriguezFatz · May 15, 2013, 08:47

But a cell zone with just one fluid is always completely filled with just that fluid.

May 14, 2013, 15:45	Assign the region to be filled with water	#1
billue123 New Member sheikh Join Date: Apr 2013 Posts: 16 Rep Power: 13	Hey guys, I am modelling a gas water heater in ansys. the problem i am facing is that i am unable to assign my water region to be initially been filled with water so that when my hot flue gases flow through the vent it heats the water. i can only assign mass flow rate to water inlet rather than assign the water cell zone being filled with water. Kindly please help

May 15, 2013, 08:21		#2
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 26	At "Solution Initialization" after initializing click on the "Patch..." button. Here you can set the volume fraction of the water phase to "1" in the relevant zones. __________________ The skeleton ran out of shampoo in the shower.

May 15, 2013, 08:33		#5
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 26	Firstly select the relevant phase in the small drop-down-menu on the left. It is set to "mixture" by default, but of course you can not set the volume fraction of the mixture. __________________ The skeleton ran out of shampoo in the shower.

May 15, 2013, 08:34		#6
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 26	Ahh ok, you don't have a multiphase problem, but two different cell zones with different fluids? __________________ The skeleton ran out of shampoo in the shower.

May 15, 2013, 08:42		#8
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 26	I never did that but under "Cell Zone Conditions" -> "Edit" you chose the material of each zone. Isn't that sufficient? __________________ The skeleton ran out of shampoo in the shower.

May 15, 2013, 08:29		#3
billue123 New Member sheikh Join Date: Apr 2013 Posts: 16 Rep Power: 13	i tried but the only variable that comes are pressure, x velocity , y velocity and temperature. what must i do?

May 15, 2013, 08:36		#7
billue123 New Member sheikh Join Date: Apr 2013 Posts: 16 Rep Power: 13	yeah that is right. one of the cell zone which is water is filled at start. the second zone is of flue gases which heats the water. how do i set my water cell zone as filled with water at initial stage

May 15, 2013, 08:44		#9
billue123 New Member sheikh Join Date: Apr 2013 Posts: 16 Rep Power: 13	that assigns the zone with a particular fluid but it doesn't fill it with one..just provide the zone with those fluid properties.

May 15, 2013, 08:47		#10
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 26	But a cell zone with just one fluid is always completely filled with just that fluid. __________________ The skeleton ran out of shampoo in the shower.

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