Volume Fraction Calculation

Submitted by NSalloum on Fri, 01/18/2019 - 09:46

Hello,

I am interested in calculating the volume fraction of my particles after filling a hopper, so I was wondering how can I do that as my geometry includes curvatures.

So may you please help me in that.

best wishes,

Forums:

NSalloum | Mon, 01/21/2019 - 08:27

Thanks Christian,

But may you please guide me how to add this filter to Paraview.

best wishes,

richti83's picture

richti83 | Mon, 01/21/2019 - 09:52

It's on Tools->Manage Custom Filters [Import].

I'm not an associate of DCS GmbH and not a core developer of LIGGGHTS®
ResearchGate | Contact

NSalloum | Tue, 01/22/2019 - 13:57

Hello Mr. Christian,

I used the filter you implemented in Paraview, but I got some inquiries that I hope you may please help me in:

1- I am getting the same "V_S" at different time steps, so how can I make sure which region is being considered for the void fraction calculation ?
2- The "Spheres" value is different than the number of particles given by Paraview at the last time step, so what is the reason for that ?
3- When you told me to know the filled volume using a CAD program, did you mean trying to draw a new 3D body over there ? (as the particles I am having on the outer layer are not perfectly aligned on a horizontal surface)
4- I am also interested in measuring the bulk density of the filled particles, so am I not supposed to use this volume I get from the CAD program to calculate it? And in this case, am I also supposed to exclude the overlapping particles?

best wishes,

richti83's picture

richti83 | Wed, 01/23/2019 - 12:01

1- depends on the source of the filter, I recomend using dump->clip->voidfraction
2- did you clip the data, can you provide a screenshot of the problem ?
3- I normaly do a "water filling" in CAD to compute the volume of a complex geometry and than using this as box volume for the filter
4- sorry I don't understand. When you know the "water filling" and the real particle volume you can easily compute the bulk density.

I'm not an associate of DCS GmbH and not a core developer of LIGGGHTS®
ResearchGate | Contact

NSalloum | Wed, 01/23/2019 - 14:32

Thanks Christian for your continuous support.

3,4- The thing is that after filling the particles inside the hopper, the top outer layer of the particles shows more or less waves structure, and I am interested in measuring the bulk density of the particles forming this shape, so can I show this shape in exact representation in a CAD program? And I didn't get what do you mean by "water filling", I thought like supposing that some how water is filling the spaces between the particles and then the total volume is equal to this volume + the volume of each particle*number of particles. If this is what you meant , may you please tell how to represent the dump files I get from LIGGGHTS in a CAD program and how can I perform the "water filling" ?

best wishes,