[billue123]

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]

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]

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

[billue123]

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]

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]

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

[billue123]

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]

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

[billue123]

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]

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