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Position Field Function

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Old   January 5, 2012, 12:56
Default Position Field Function
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Hi Guys,

I'm relatively new in using Star CCM, and I have a pretty complex task to do. I've used tutorials and gained a pretty decent understanding of how to get most basic thing working (I hope).

My main task is to create a free surface flowing pond, with inlet and outlet, so I can track the residence time distribution of injected particles. Instead of starting out with a irregular pond shape. I've decided to use a simple rectangular "pond" with a simple inlet and outlet.

Now I believe my set-up is correct, and I'm using a implicit unsteady, multi-phase flow, with gravity, and modelling air and water. Now I would like the "pond" to initially be filled halfway with water, so the inflow can generate a steady current.

In the initial conditions, I set the volume fraction as a composite, and used a field function to define the water as I had seen in a previous tutorial. I am using the field function:

Code:
($$Position[1]<=-0.5)?1:0
But when I make a scalar plot of this field function it does not appear to show anything, and I'm not sure why.

Any help would be greatly appreciated.

Many Thanks

Amish
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Old   January 6, 2012, 03:29
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Initialize the solution and then you should see your initial condition setting at the boundaries.
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Old   January 6, 2012, 10:54
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Hey thank you so much for that. I did indeed forget to initialise, however I also forgot to select the fluid as a part to show.

Once doing both. It showed up nicely, and I'm glad the field function worked out well.

Thank you.
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