Forum: FLUENT
February 26, 2020, 10:57
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Replies: 49
Views: 30,772
Code
The code is good but not meant to be used for models other than Eulerian Wall Film Model.
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Forum: FLUENT
February 26, 2020, 02:54
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Replies: 49
Views: 30,772
UDF Compilation
The reason your UDF does not compile is that either you do not have the compiler installed or Fluent cannot find it. You need to have either VS or VC+ or MS Build Tools with C++ compiler installed in...
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Forum: FLUENT
February 25, 2020, 16:17
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Replies: 49
Views: 30,772
Phenomenon
I am afraid I do not understand what you mean by Phenomenon. As far as the mesh is concerned, if you want mesh to be similar to the one in the paper, you may have to refine it further. But at its...
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Forum: FLUENT
February 25, 2020, 03:00
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Replies: 49
Views: 30,772
Mesh quality
As stated earlier, the mesh you have is good. However, more important characteristic of the mesh is the height of the first cell. If it is too large as compared to the requirement of the models and...
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Forum: FLUENT
February 24, 2020, 14:49
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Replies: 49
Views: 30,772
Mesh quality
The mesh is already as uniform as it can get. It's the height of first cell and the growth rate that matters.
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Forum: FLUENT
February 24, 2020, 11:49
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Replies: 49
Views: 30,772
Mesh size
For normal flows, mesh size is usually selected on the basis of y^+. However, for thin films, you have to ensure that there are atleast 10-12 cells within the expected film thickness. If film is too...
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Forum: FLUENT
February 24, 2020, 11:28
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Replies: 49
Views: 30,772
VOF or EWF
VOF is applicable as long as N-S is applicable, however, it becomes very expensive since a very fine mesh, spatial as well as temporal, is required. EWF can be used as long as film thickness is...
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Forum: FLUENT
February 24, 2020, 11:16
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Replies: 49
Views: 30,772
Online Link
I hope the following is useful
http://dl.mr-cfd.com/tutorials/ansys-fluent/08-EWF_Tutorial2(Eulerian).pdf
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Forum: FLUENT
February 24, 2020, 11:08
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Replies: 49
Views: 30,772
Accuracy
As stated earlier, Geo-reconstruct is the best available option. However, this is about reconstruction of the interface. Capturing depends a lot on the mesh. If the mesh is fine enough, results will...
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Forum: FLUENT
February 24, 2020, 11:01
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Replies: 49
Views: 30,772
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Forum: FLUENT
February 24, 2020, 10:44
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Replies: 49
Views: 30,772
VOF Formulation
Transient formulation in Fluent's pressure based solver is always implicit. Implicit means that VOF capturing is implicit.
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Forum: FLUENT
February 23, 2020, 16:28
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Replies: 49
Views: 30,772
Vof
Geo-Reconstruct is the best reconstruction algorithm available in Fluent, however, CICSAM is good as well and is available with implicit VOF.
EWF is a separate model under Models. But it is not...
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Forum: FLUENT
February 22, 2020, 16:34
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Replies: 49
Views: 30,772
Vof
Is there any particular reason for using Explicit VOF? If you are modeling a falling film and the film is quite thin, better to use Eulerian Wall Film model. Modeling a thin film with VOF is always...
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Forum: FLUENT
February 21, 2020, 04:36
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Replies: 49
Views: 30,772
For spatial
Spatial discretization can make use of second-order or even higher-order. However, time-discretization does not have data for higher-order.
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Forum: FLUENT
February 17, 2020, 16:17
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Replies: 49
Views: 30,772
Temporal Order in VOF
Second order time-discretization scheme, either pure 2nd order or bounded one, are not available for Explicit VOF. This is because 2nd order requires a larger stencil of time, i.e., n-1, n, and n+1,...
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