Applying initial condition

kaveh · July 2018

Deal all

Does anybody know that how can I apply an initial condition to a set of fluid particles? I noticed Case4 where an external force varying by time is applied to the fluid particles. But I want to apply initial velocity, acceleration and pressure which vary with the position of particles (both in X and Z coordinates), for example as a cosine function.

regards

zweihuehner · July 2022

https://forums.dual.sphysics.org/discussion/1365/applying-initial-condition

Did you find a solution for this ?

Alex · July 2022

You can use INITIALS option to assign a initial velocity to a give fluid domain (Check XML_GUIDE.pdf)

You can also use INLET to assign initial pressure distribution

zweihuehner · July 2022

https://forums.dual.sphysics.org/discussion/comment/5454#Comment_5454

Thanks Alex,

I checked your suggestions and I found <velwave> to be an interesting options for my problem. Its usage is explained in CaseTemplate.xml.

However, I would be interested in the underlying theory the solitary wave uses. Where can I find any information about this? It is only very shortly mention in the XML_GUIDE.pdf

Also, in CaseTemplate.xml I found <velmesh>, which seems to allow to import a .csv file. This option is not mention in the XML_GUIDE.pdf. Do you know if it allows to set the initial velocity for each fluid particle by a csv file? Unfortunately, there is no description, how the .csv fiel has to look.

Kind regards,

Faro

Asalih3d · August 2022

https://forums.dual.sphysics.org/discussion/comment/5456#Comment_5456

In these cases it is the best to just try and poke around with a very simple case and try the options. Hope it works out for you!

Kind regards

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Applying initial condition

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