No particles with mkfluid 1 (fluid with a prism shape)

ShadiShadi
in DualSPHysics v4.4

Dear DualSPHysics users,

I am trying to set a model with a non-Newtonian fluid on a ramp which its initial shape is a prism.

image.png


First I used drawprism and then fill the prism as following:

 <setmkbound mk="1" />

          <drawprism >

            <point x="50" y="12" z="170" />

            <point x="75" y="12" z="125" />

            <point x="100" y="12" z="170" />

            <point x="50" y="-12" z="170" />

            <point x="75" y="-12" z="125" />

            <point x="100" y="-12" z="170" />

             

          </drawprism>

           <shapeout file="Mud" /> 

 <!-- Mud-->   

           

           <setmkfluid mk="1" />

          <fillbox x="75" y="0" z="130">

            <modefill>void</modefill>

            <point x="-500" y="-200" z="125" />

            <size x="400" y="600" z="25" />

          </fillbox>

          <_pointsmkout file="fluid2" />

          <shapeout file="Mud" />       

           

But I faced with the error that there is no particles with mkfluid=1

I would be glad if you could help me to solve it.


Thank you.

Comments

  • TPouzolTPouzol

    Hello,

    Your fillbox has an error in X.

    point -500, size 400 would give you a max x at -100

    and your seed is 75 so no particles generated

    Regards

  • ShadiShadi
    https://forums.dual.sphysics.org/discussion/comment/5839#Comment_5839

    Hello TPouzol,

    Thanks for your response.

    I changed it to:

    <setmkbound mk="1" />

         <drawprism >

          <point x="50" y="12" z="170" />

          <point x="75" y="12" z="125" />

          <point x="100" y="12" z="170" />

          <point x="50" y="-12" z="170" />

          <point x="75" y="-12" z="125" />

          <point x="100" y="-12" z="170" />

            </drawprism>

      <shapeout file="Mud" /> 

     <setmkfluid mk="1" />

         <fillbox x="75" y="0" z="130">

          <modefill>void</modefill>

          <point x="-500" y="-200" z="125" />

          <size x="700" y="600" z="25" />

         </fillbox>

         <_pointsmkout file="fluid2" />

         <shapeout file="Mud" />   


    But I faced with the same error.

  • TPouzolTPouzol

    Hello,

    Prism should be in mkfluid also, and according to the prism and your drawing the fillbox is weird. Something like :

    <setmkfluid mk="1" />

    <drawprism >

          <point x="50" y="12" z="170" />

          <point x="75" y="12" z="125" />

          <point x="100" y="12" z="170" />

          <point x="50" y="-12" z="170" />

          <point x="75" y="-12" z="125" />

          <point x="100" y="-12" z="170" />

            </drawprism>

    <fillbox x="75" y="0" z="130">

          <modefill>void</modefill>

          <point x="50" y="-12" z="125" />

          <size x="50" y="24" z="45" />

         </fillbox>

         <_pointsmkout file="fluid2" />

         <shapeout file="Mud" />


    Also what is the resolution ?

    And I think there is an option to autofill the prism (check documentation). I never use draw function but only import stl files can't help you here

    Regards

  • ShadiShadi
    edited June 2023
    https://forums.dual.sphysics.org/discussion/comment/5842#Comment_5842

    Hello,

    Thank you for your suggestion. I could solve it and fluid particles could be stored. The resolution is dp=0.8 .

    However, some particles penetrate from the boundary.

    I changed the StepAlgorithm from Symplectic to verlet and still the particles peneterate throgh the boundary.

    I am seeking any ideas or suggestions you may have to help resolve this matter.

    image.png


    Regards,

  • TPouzolTPouzol

    Hello,

    Nice !

    You should ensure that your boundaries are multi layered !

    Regards

  • ShadiShadi
    https://forums.dual.sphysics.org/discussion/comment/5845#Comment_5845

    Hello,

    Thanks for your suggestion :)

    I am trying to apply try mDBC.

    Best regards,

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