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May 17, 2010, 07:20 |
Particle Tracking
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#1 |
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Hi,
there are two possibilties for particle tracking in CFD: simultaneous and gradual. Which kind of tracking is implemented in CFX for steady state simulations? Thanks in advance Claudia |
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May 17, 2010, 07:42 |
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#2 |
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Glenn Horrocks
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I have no idea what simultaneous and gradual means. In CFX, for steady state simulations you can have one-way coupled particles (where the particles do not affect the flow field) and two-way coupled particles (where the particle affects the flow field).
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May 17, 2010, 07:59 |
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#3 |
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Sorry, I think the question was not clear.
Just try again: If I have a lagrangian particle tracking, I have a calculation of the particle tracks. Does CFX calculate first one complete track from start to end and then the next track from start to end and so on? or: takes CFX every particle at the same time, moves all particel a small timestep, and calculate them again? Was it more clear? Thanks, Claudia |
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May 17, 2010, 09:07 |
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#4 |
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Glenn Horrocks
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I don't know. Why does it matter? In a steady state simulation run to convergence the answer will be the same.
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May 17, 2010, 09:10 |
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#5 |
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This is a part of the simulation theory in my PhD. But you are right, it should have no influence on the results :-)
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May 17, 2010, 19:50 |
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#6 |
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Glenn Horrocks
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The more important question is how the particle tracks are coupled back to the flow in the case of two-way coupling. In this case the flow is solved, then the particle tracks are solved based on the flow field, then the flow is re-computed based on the coupling with the particle tracks.
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May 18, 2010, 03:42 |
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#7 |
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Glenn, you are completely right, it was information only :-).
The Way of coupling is two-way and this is the right choice for this problem. Greets, Claudia |
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