New question #670889 on Yade: https://answers.launchpad.net/yade/+question/670889
Hi, I'm also doing some work related to the removal of particles, and I have a problem similar to Question #452277. https://answers.launchpad.net/yade/+question/452277 I tried to set the flowEngine.dead=1 and then set it to 0 after few steps, which didn't work. I tried to slice the list of engines to instantiate the flowEngine, which led to memory leak. Do anyone have a way to release the memory effectively? Can anyone give me some suggestion? Thanks a lot. I'm running Yade 2018.02b, Ubuntu 18.04. My code is shown as follow: ============================================= from yade import pack,qt,plot num_spheres=1000# number of spheres young=1e6 compFricDegree = 3 # initial contact friction during the confining phase finalFricDegree = 30 # contact friction during the deviatoric loading mn,mx=Vector3(0,0,0),Vector3(2,2,6) # corners of the initial packing flag=1 flag2=0 O.materials.append(FrictMat(young=young,poisson=0.5,frictionAngle=radians(compFricDegree),density=2600,label='spheres')) O.materials.append(FrictMat(young=young,poisson=0.5,frictionAngle=0,density=0,label='walls')) walls=aabbWalls([mn,mx],thickness=0,material='walls') wallIds=O.bodies.append(walls) sp=pack.SpherePack() sp.makeCloud(mn,mx,rMean=0.3,rRelFuzz=0,num=50,periodic=False) sp.makeCloud(mn,mx,rMean=0.03,rRelFuzz=0,num=1000,periodic=False) sp.toSimulation(material='spheres') triax=TriaxialStressController( thickness = 0, stressMask = 7, max_vel = 0.005, internalCompaction=0, # If true the confining pressure is generated by growing particles # wall_bottom_activated=False ) newton=NewtonIntegrator(damping=0.2) O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Box_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom(),Ig2_Box_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys()], [Law2_ScGeom_FrictPhys_CundallStrack()],label="iloop" ), FlowEngine(dead=1,label="flow"),#introduced as a dead engine for the moment, see 2nd section GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=100,timestepSafetyCoefficient=0.8), triax, newton, ] triax.goal1=triax.goal2=triax.goal3=-10000 while 1: O.run(1000,1) unb=unbalancedForce() if unb<0.001 and abs(-10000-triax.meanStress)/10000<0.001: break setContactFriction(radians(finalFricDegree)) ## ______________ Oedometer section _________________ triax.stressMask=7 triax.goal1=triax.goal2=triax.goal3=-10000 #B. Activate flow engine and set boundary conditions in order to get permeability flow.dead=0 flow.defTolerance=0.3 flow.meshUpdateInterval=100 flow.useSolver=3 flow.permeabilityFactor=1 flow.viscosity=10 flow.bndCondIsPressure=[0,0,0,0,1,1] flow.bndCondValue=[0,0,0,0,100,0] flow.boundaryUseMaxMin=[0,0,0,0,0,0] O.dt=0.1e-4 O.dynDt=False newton.damping=0 triax.wall_back_activated=0 O.engines=O.engines+[PyRunner(command='addPlotData()',iterPeriod=100),] O.engines=O.engines+[PyRunner(command='erosion()',iterPeriod=100),] def erosion(): global flag global flag2 k=0 if flag: for i in O.interactions: if i.id1==5: if i.id2>5 and O.bodies[i.id2].shape.radius<0.1: k=i.id2 O.interactions.erase(i.id1, i.id2) O.bodies.erase(k) flag2=1 if i.id2==5: if i.id1>5 and O.bodies[i.id1].shape.radius<0.1: k=i.id1 O.interactions.erase(i.id1, i.id2) O.bodies.erase(k) flag2=1 if flag2: flag=0 O.pause() O.engines=O.engines[0:3]+O.engines[4:] O.step() O.step() O.engines=O.engines[0:3]+[FlowEngine(dead=0,label="flow"),]+O.engines[3:] flow.defTolerance = 0.3 flow.meshUpdateInterval = 100 flow.useSolver = 3 flow.permeabilityFactor = 1 flow.viscosity = 10 flow.bndCondIsPressure = [0, 0, 0, 0, 1, 1] flow.bndCondValue = [0, 0, 0, 0, 100, 0] flow.boundaryUseMaxMin = [0, 0, 0, 0, 0, 0] O.dt = 0.1e-4 O.dynDt = False O.step() O.step() O.step() flag=1 O.run() ============================================= Best, Zhang Wenyue -- You received this question notification because your team yade-users is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
