# How to create a fluid volume inside a solid volume

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 November 7, 2008, 09:37 How to create a fluid volume inside a solid volume #1 sanin Guest   Posts: n/a Sponsored Links hello, i have to create a rectangular microchannel inside an aluminium brick, the channel running through the brick from one face to the opposite face or let's say the brick is hollow having a rectangular hole within it.Water runs through the rectangular channel carrying away heat from the aluminium block.So i have to make 2 volumes, water and aluminium surrounding it. How can i create this mesh in GAMBIT?Will just subtracting the channel volume from the block would do? I need urgent help regarding this.Thank you. Sanin

 November 7, 2008, 15:40 Re: How to create a fluid volume inside a solid vo #2 frederick Guest   Posts: n/a i would split the outer brick with the inner volume, deselect "retain". specify continuum types where appropriate.

 November 7, 2008, 16:13 Re: How to create a fluid volume inside a solid vo #3 Saravanan Guest   Posts: n/a Hi I am also trying to solve problem very similar to the one above. So instead of posting a new message, I am continuing in this one. As you said I have created two volumes and split it and specified the solid and fluid continuum types. Now I want to do Conjugate HT on this model. I know the initial temperature of the solid and the properties of the fluid which is flowing through this micro channel. When I import the Gambit model into FLUENT it has automatically created shadow wall for all the walls which are adjacent to the fluid. Now what BC's do I have to specify for the wall-one and wall-one-shadow. Thanks in advance.

 November 7, 2008, 21:44 Re: How to create a fluid volume inside a solid vo #4 frederick Guest   Posts: n/a You should specify the temperature, radiation, and slip-condition at the "wall-one" zone. You may have to specify these conditions for the wall shadow as well. I had noticed that the DPM boundary conditions only are available for wall-shadows in at least one setup I encountered. I know you are not using the DPM model (or probably aren't), but I thought I would say this anyhow.

 November 13, 2008, 16:17 Re: How to create a fluid volume inside a solid vo #5 S Guest   Posts: n/a I defined the Boundary conditions on all the wall and shadow wall surfaces and for the fluid I defined the initial temperature at the velocity inlet BC. But how do I specify the initial temperature of the solid volume. I can only define wall BCs. Thanks S

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