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July 28, 2015, 13:06 |
use two-dimensional solution
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#1 |
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A.heydari
Join Date: May 2015
Location: IRAN
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Hi;
If we want to use two-dimensional solution, 1. Which thickness can be used to model (for example, thickness of model is 7.5 cm,in two-dimensional model, how much?) 2. What proportion of the input should be a discharge plan (for example, 1.5 liters per second flow rate of input, how much in two-dimensional model?) |
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July 28, 2015, 17:53 |
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#2 |
Senior Member
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trawl through the recent posts. There was something that Ansys assumes the depth with 1m
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July 28, 2015, 19:05 |
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#3 |
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Glenn Horrocks
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Q1: See FAQ: http://www.cfd-online.com/Wiki/Ansys..._simulation.3F
Q2: A 2D planar model will have a flow rate like 10 l/s per metre. In CFX as you are modelling the depth you have to scale it accordingly - so if your mesh is 0.1m thick then you would need to apply 1 l/s. |
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July 20, 2023, 15:55 |
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#4 | |
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Quote:
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July 20, 2023, 16:45 |
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#5 |
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If you are running double precision, and reasonable aspect ratio for the mesh it should not matter.
However, if the planes are too far apart, high aspect ratio and single precision, you must recall that Ansys CFX is vertex based; therefore, there are two solution fields on each symmetry plane and because a solution algorithm is not perfectly symmetric, you may get into spurious iterations and it may take longer to converge.
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