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January 15, 2008, 14:14
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Pressure Gradient!
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#1 |
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Guest
Posts: n/a
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Hi guys
How can i specify constant pressure gradient in my LES simulation. In paper they have used -1.59 Pa/m as a constant pressure gradient. How can i use that value as my pressure in CFX? Thanks |
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January 15, 2008, 17:29
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Re: Pressure Gradient!
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#2 |
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Guest
Posts: n/a
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Hi,
Isn't the pressure gradient a result of the simulation or experiment, not an input to it? Glenn Horrocks |
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January 16, 2008, 04:30
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Re: Pressure Gradient!
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#3 |
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Guest
Posts: n/a
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Are you modelling a section of pipe or channel? If this is the case you can either:
1. Use a subdomain momentum source in the flow direction to drive the flow, which gives the desired dP/L. 2. Use a periodic domain interface with the Pressure Change option. The gradient is then (specified pressure change)/(Length of domain). Johnson |
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