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Amplification factors in SolidWorks Flow Simulation?

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Old   August 30, 2011, 09:05
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Boris Marovic
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A plane is not defined in size, just in location, therefore it is distributed on that plan in the whole computational domain. If you want to specify a certain area you will have to create a part/body with a planar surface on that level you want to have the points and select this surface instead of the plane. then the points will be distributed only on the surface as a surface is limited by its size.
But make sure you deactivate the part/body in the component controls as it is not a solid in the calculation, it shall be not present for the calculation, just as a reference object.
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Old   August 30, 2011, 09:55
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I succeeded in getting the point parameters, results in excel file.
I will let you know if I have any problems with Techplot when I download it.

Thank you once again Boris. What would I do without you.

Last edited by george85; August 30, 2011 at 13:31.
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Old   August 31, 2011, 19:09
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I know you already told me that you did it 5 years ago, but maybe you can recall something:

Here are the points I took for calculation from SolidWorks:



Here is the excel file I want to import into Tecplot 360, and get the plot from it:



And here is the result which I get when I import it:



Now, it seems I need to do some changes in the "Mapping Style"?

Here are all Mapping Style options:



Did you remember anything?

Last edited by george85; September 1, 2011 at 08:32.
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Old   September 5, 2011, 04:03
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Hi George,
I'm sorry but I cannot really remember what the mapping style will change in the plot. But for me it looks like you used a x-y line plot as you can see in your third image.
You should try to rearrange the excel field with x values as row and y values as column.
I just searched techplot in google and got onto this page via Wikipedia:
http://download.tecplot.com/tecio/

Here you'll find a user manual which will help you much better than I can. Check out page 78 which is exactly what you'll need. Having 2D plot of your date from a certain Excel file format. as I said x coordinates are the first row, y coordinates the first column and the corrensponding values to these coordinates are in the intersecting cells to these coordinates.

Boris
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Old   September 5, 2011, 15:49
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Thank you for the help Boris. I succeeded! But the results do not look like they should.

I imported the .xls file into Tecplot, Created the Rectangular Zone, Interpolated the data from .xls file (this is all from the Help file, I think I did it correct).

Here is what I got as a result:



Here are the results I got in SolidWorks Flow Simulation, for wind velocities.
Without the building (curved roof):


And with building:


So it seems something is wrong with the Aplification factors in Tecplot???
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Old   September 6, 2011, 03:20
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I don't know, have you checked the numerical data at the positions you think are wrong? If the red region is wrong but in the excel sheet the show the highest values than Techplot is correct and the calculation in Excel is wrong.
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Old   September 6, 2011, 05:32
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I did not understand you this part:

"If the red region is wrong but in the excel sheet the show the highest values than Techplot is correct and the calculation in Excel is wrong."
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Old   September 6, 2011, 05:40
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Up, sorry my quick typing.
I meant if the red area in your Techplot image is not correct but the Excel sheet values have the highest values at these coordinates then the Techplot results are good and you should check the excel calculations.
Simply compare the numerical values with the graphical ones. if the error happens in Techplot then there is a problem with the data translation but if Excel has already the highest values then you probably have the error in the excel calculation.
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Old   September 6, 2011, 10:58
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What seems to be strange is that I checked it 2 times, and both the data from Excel and Tecplot were correct.

I tried to lower the number of Points in the Point Parameters from 1000 to 100.
And it seems I succeeded to get the correct result, or at least it looks to me that this result is more correct than the previous one:



Some points (especially the ones that were on the solid (roof)) had very low Velocity value presented in exponential way (example 2.3412121E-17).
What I did is converted all this values to 0.1 and then divide it between each other (values of velocity with and without the buildings).

Its interesting that I did the same thing at the 1000 points version.

So I do not know what seems to be the problem at the previous 1000 version?

Anyhow, I think this is the final solution? At least it looks like.
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Old   September 6, 2011, 11:11
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Maybe it's related to the mesh resolution. I cannot really tell.
You can also try to use a sketch on the surface you use for the points and draw a line through a fewsections and use them in a xy-plot to see the changes along this line to check if they are correct. Of course use the calculation of the parameters along the line again to calculate the amplification factor.
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Old   September 6, 2011, 14:03
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Thank you for the reply.

Again Boris I did not understand you. I am apologizing
Is this what you meant:



Uploaded with ImageShack.us

Sorry for ignorance
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Old   September 7, 2011, 05:35
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Cannot tell what type of line this is from the image.
Basically draw a line in a sketch on the surface you want to have the results. Then use the SWFS feature "XY-Plot" select the line and the parameter you need and export that into Excel, do the same for the other results and then calculate the magnification factor and plot that in a excel graph just like the single XY-Plots were plotted.
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Old   September 10, 2011, 20:58
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Here are the results I got from the XY Plot in Solidworks:



And here are the ones I got from making a section on the Tecplot contour:




So it`s OK?!

Thank you Boris. I owe you a favor! A beer, or couple of those!
You are truly invaluable member of this community.

THANK YOU!

Last edited by george85; September 11, 2011 at 05:14.
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