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Old   May 14, 2013, 15:45
Default Assign the region to be filled with water
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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
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Old   May 15, 2013, 08:21
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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.
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Old   May 15, 2013, 08:29
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i tried but the only variable that comes are pressure, x velocity , y velocity and temperature. what must i do?
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Old   May 15, 2013, 08:33
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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
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Old   May 15, 2013, 08:33
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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.
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Old   May 15, 2013, 08:34
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Ahh ok, you don't have a multiphase problem, but two different cell zones with different fluids?
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Old   May 15, 2013, 08:36
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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
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Old   May 15, 2013, 08:42
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I never did that but under "Cell Zone Conditions" -> "Edit" you chose the material of each zone. Isn't that sufficient?
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Old   May 15, 2013, 08:44
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that assigns the zone with a particular fluid but it doesn't fill it with one..just provide the zone with those fluid properties.
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Old   May 15, 2013, 08:47
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But a cell zone with just one fluid is always completely filled with just that fluid.
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