How to get the force value of fixed wall

TomTom
in DualSPHysics v5.0

I simulate the floatings by using DCDEM, there are collisions between floatings and fixed walls, I want to get the force value of the wall, is it possible?

I would be grateful for any suggestions

Tom

Comments

  • AlexAlex

    You can find some examples about how to get the force of fixed walls...

    I invite you to navigate through the PDF files you can find in DualSPHysics_v5.0\examples.

    One of those examples is DualSPHysics_v5.0\examples\main\01_DamBreak

  • TomTom
    https://forums.dual.sphysics.org/discussion/comment/5239#Comment_5239

    Hi, Alex

    I am very sorry to reply to you so late. I understand and thank you for the approach.

    Thank you so much

    Best regards

    Tom

  • VijayVijay
    https://forums.dual.sphysics.org/discussion/comment/5239#Comment_5239

    Hi @Alex, I would like to ask mu query regarding similar problem.

    In DamBreak example, we are - 

    <!-- Creating void where building is present .... -->
          <setmkvoid />
          <drawbox>
            <boxfill>solid</boxfill>
            <point x="0.9" y="0.24" z="0" />
            <size x="0.12" y="0.12" z="0.45" />
          </drawbox>

<!-- Creating faces.... -->
          <setmkbound mk="1" />
          <drawbox>
            <boxfill>top | left | right | front | back</boxfill>
            <point x="0.9" y="0.24" z="0" />
            <size x="0.12" y="0.12" z="0.45" />
          </drawbox>

<!-- Giving left face a different mk number, here mk = 10, so that we could calculate force on that face by using computeforces... -->
          <setmkbound mk="10" />
          <drawbox>
            <boxfill>left</boxfill>
            <point x="0.9" y="0.24" z="0" />
            <size x="0.12" y="0.12" z="0.45" />
          </drawbox>					
          <shapeout file="Building"/>

<!-- In computeforces command we need to give onlymk as mk + 10 i.e. onlymk:20  -->

    
    
    
        
            image.png


    Could you please confirm if my understanding is correct?


    Thank you.

  • VijayVijay

    Referring to above question, I would also like to ask a follow up question. Suppose, we are instead using a stl file of building. There we need to assign mk value to whole stl geometry. How can we then compute forces on that particular face?

    Like for my case I have done - 

    					<!-- Building -->	
					<setdrawmode mode="face" />
					<setmkbound mk="1"/>
					<drawfilestl file="building.stl" objname="building" autofill="false">
						<drawscale x="0.001" y="0.001" z="0.001" />
						<drawmove x="25.79" y="2.75" z="0.8" />
					</drawfilestl>

    Please let me know how can we achieve the same using stl?

    Thank you.

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