CASESLOSHING how to compute forces acted on boundary walls???

SUMMER

Hello Dualsphysics community!

I'd like to know, how to compute the forces acted on boundary walls in the casesloshing example??

Your help is appreciated;

Thank you!

Alex

Select boundaries by MK and use ComputeForces.exe

Regards

Iman

1. Open the CaseSloshingTankCar_win64_GPU.bat with Notepad.

2. add this line:

set computeforces="../../EXECS/ComputeForces4_win64.exe"

and this line after %partvtkout%

%computeforces% -dirin %dirout% -filexml %dirout%/%name%.xml -onlymk:11 -savecsv %dirout%/WallForce
if not "%ERRORLEVEL%" == "0" goto fail

You should find the MK number either defining it or checking CaseSloshing??.xml file in ???_out folder.

Iman

Alex

CaseDambreak already includes this example.
Please take a look first to the testcases

Alex

SUMMER

I think I first should learn how to define MK number for a set of particles. Should I define MK value for the walls ? For each wall seperately can I define it?

I will examine the example closer Alex, thank you

Thank you all

Alex

You can define the walls of the tank as separate MK and then use the particles defined by that MK to compute forces on them

Regards

SUMMER

Thank you Alex,

I believe in the current CaseSloshing example
setmkfluid mk="0" and _setmkbound mk="1"

One mk is defined as fluid other as boundary I understand that. But I could not figure out where these mk definitions have been made for this example, CaseSloshing.

And if boundary mk is 1, can I simply compute forces on the boundary for mk=1 on this example, CaseSloshing?

Thank you!!

Alex

Page 91 of the XML_v4.0_GUIDE:
NOTE value of final “mk”
mk=mkbound+11
mk=mkfluid+1

This is because 10 objects are the maximum to define fluid!

SUMMER

Hey!
Thank you Alex!

I wrote -onlymk:12 because boundary mk is 1, and still i compute forces as 0.
in wallForces document. What am I doing wrong?

I'd appreciate your help very much;

SUMMER

I have also tried mk=11 and it worked I have found it from .xml in .out file for future reference

Thank you!!
fixed mkbound="2" mk="13" begin="0" count="2" />
moving mkbound="0" mk="11" begin="2" count="480" refmotion="0" />
fluid mkfluid="0" mk="1" begin="482" count="7021" />

SUMMER

Hey!!

I have found force acting on ALL BOUNDARIES with mk=11 but now I would like to find forces acting ONLY ON SIDE walls in order to compare with experiment results.

Am I able to create a new group with a new "mk" value just designating side walls?? like mk=21, i want it to mean side walls.. I am not sure how to define it seperately?...

setmkbound mk="0" />
drawbox>
boxfill>all
point x="-0.295" y="-0.1" z="0" />
size x="0.590" y="0.2" z="0.1" />
/drawbox>

the above is the code now I am using in basic CaseSloshing example

Can i define walls seperately by making both z's equal to 0 with different mk's 0,1,2 ?

Thank you!!

SUMMER

Actually I have defined with different mk's 4 walls with the same command but this time i could not give motion to all but still only the one with mk=0 is moving so I have changed objreal ref="0-2" but still only mk=0 is moving

I know that I am playing with the correct thing .. I am searching how to give motion to both 0 and 1. Now I did 0:1... and it is not working either I rewrote those lines, I hope this will let me calculate forces on side walls but still if there is any other way that i dont know how to calculate only side wall forces i would appreciate that

I'd be glad if you have other suggestions,

Thanks

Alex

You can find examples of motions to different MK in the MOTION folder