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How to advance on Task 3 of "Multidomain Modeling The Fluid Domain" in Simscape Onramp?
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Hello, I have done everything that is indicated for task 3 (Multidomain ModelingThe Fluid Domain) in Simscape Onramp, but the training assesment panel indicates my plot is wrong. I have checked everything several times and started over again the whole task, but still don't get the plot indicated on the training assesment panel. Any suggestions please?
13 Comments
Rodrigo Gil Marin
on 29 Mar 2022
In the Liquid Properties block, please change the value for 'Volumetric fraction of entrained ...' to zero. This should allow you to move forward with the training
Jose Espinosa
on 29 Mar 2022
Thanks Rodrigo, it worked. I wasn't aware of that air property.
Thank you!
James Lagroue
on 18 Apr 2022
Excuse me but I can’t find anything like that in the block parameters of pipe (il). Where are you seeing this?
Peter Dittrich
on 18 Apr 2022
Holly moly, I advanced in the online version to this point in order to notice that this problem does not only occur on Desktop.
Thanks Rodrigo, setting the 'Volumetric fraction of entrained air in the mixture at atmospheric pressure' to zero helped!!
Accepted Answer
Rodrigo Gil Marin
on 3 May 2022
In the Liquid Properties block, please change the value for 'Volumetric fraction of entrained ...' to zero. This should allow you to move forward with the training
10 Comments
Dennis Kachila
on 11 May 2022
wow!! thank you for that i have stuck here for so long tried everythong too..
The solution worked properly with the given answer.
Sarmad Doulan
on 14 May 2022
Hi Rodrigo, I have the same exact issue. However, when I changed the Volumetric fraction of entrained ...' to zero, it didn't solve the issue. Anythoughts?
Alisha Schor
on 27 Jun 2022
This is related to a change in the default parameter value for that block: https://www.mathworks.com/help/physmod/simscape/release-notes.html?rntext=isothermal+liquid&startrelease=R2019a&endrelease=R2022a&groupby=release&sortby=descending&searchHighlight=isothermal+liquid
"To improve simulation robustness, the default amount of entrained air for the isothermal liquid domain has been changed from 0 to 0.005."
The course will be updated in a future release to not require this workaround. Thank you for your help, Rodrigo!
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