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One Dimentional Flow (Heeeeelp)

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Old   April 25, 2004, 09:21
Default One Dimentional Flow (Heeeeelp)
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Hello everybody

I think I have a simple problem. I am going to solve the flow equations (time dependent) for natural gas in a very long pipeline. As the diameter of the pipe section is really negligible with respect to its length,I just need Fluent to solve one dimentional flow Eqs for me. What I want to know as a result is the change in basic flow parameters( velocity, temperature, pressure) in different times in distances about 20-30 m . please tell me what fluent can do about one-dim flows. As far as I know the simplest grids Gambit can produce is two dimentional grid. thx
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Old   April 25, 2004, 10:43
Default Re: One Dimentional Flow (Heeeeelp)
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why dont you just solve an axisymetric problem? it wont be too expensive.

If not analytical solutions are available for this case.
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Old   April 25, 2004, 23:03
Default Re: One Dimentional Flow (Heeeeelp)
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Why do you want to do 1-D in fluent. It is simple to write your own code for it. However you you will never get a change in a spatial change in the velocity even in the developing region with 1-D solver. some temporal if you initialize with zero. A good test is to use just one grid and to simulate a channel with only one grid in the vertical height. Boundary copnditions you use may be a slip wall.
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