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[Question #689547]: Few beginners questions on PFV
New question #689547 on Yade:
I have really enjoy using YADE and I want to start involving fluid flow. I have read  and I have a few questions:
1. According to  YADE makes triangles (3D pyramids) between spheres and surrounding walls. How can I find out the pore numbers and there exact x,y,z location. Here pores would be the center point of a triangle.
2. I am applying pressure at a specific x,y,z location using flow.imposePressure(Vector3(1,0.83,0),30000000). Would this be correct?
3. I often get the following error:
Error: CHOLMOD error: argument missing. file: ../Cholesky/cholmod_factorize.c line: 121
Segmentation fault (core dumped)
In general, what does this error mean? Should I be installing something to make my model work or is this error associated with but in my YADE model?
4. I have the following code. I am applying a pressure of 30000000Pa at the point (1,0.83,0). There are 4 spheres and the pressure is being applied at an empty space in-between the sphere. When the code runs, none of the spheres move. This is extremely confusing. I mean, the pressure is a lot. I noticed that there is a force that is applied on the spheres due to the pressure (through the inspect button), but I don’t see any movement. Am I doing something wrong? Please help.
Thank you sooo much for your time. I really appreciate it.
Catalano E. A pore–scale coupled hydromechanical model for biphasic granular media. Application to granular sediment hydrodynamics[D]. PhD thesis, Université de Grenoble, 2012.
# MATERIAL PROPERTIES
intR=0.1 # allows near neighbour interaction (can be adjusted for every packing)
DENS=2500 # Density
mn,mx=Vector3(0,0,-0.5),Vector3(5,9,0.5) # corners of the initial packing
sphere(center=( 0.5, 0.5, 0.0),radius=0.5,material='mat1'),
sphere(center=(1.5, 0.5, 0.0),radius=0.5,material='mat1'),
sphere(center=( 2, 1.4, 0.0),radius=0.5,material='mat1'),
# SIMULATION LOOP
#flow.bndCondIsPressure=[1,1,0,0,0,0] #only accepts 1 or 0 values
#flow.boundaryUseMaxMin=[1,1,1,1,1,1] #only accepts 1 or 0 values
from yade import plot
# SAVE SIMULATION
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