New question #697433 on Yade: https://answers.launchpad.net/yade/+question/697433
Hi, I'm also trying to remove some particles from the simulation while using FlowEngine engine to simulate a fluid flow. According to Questions #452277 and #670889, I used the simple method of instantiating a brand new FlowEngine after removing particles, however, segmentation faults still occurred. For complex methods, reset functions need to be executed in C + + code. Can you give the relevant C + + source code link? Thanks a lot! My code is shown as follow: ## ______________ First section, similar to triax-tutorial/script-session1.py _________________ from __future__ import print_function from yade import pack 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(1,1,1) # corners of the initial packing 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,-1,0.3333,num_spheres,False, 0.95,seed=1) #"seed" make the "random" generation always the same sp.toSimulation(material='spheres') triax=TriaxialStressController( maxMultiplier=1.+2e4/young, # spheres growing factor (fast growth) finalMaxMultiplier=1.+2e3/young, # spheres growing factor (slow growth) thickness = 0, stressMask = 7, max_vel = 0.005, internalCompaction=True, # If true the confining pressure is generated by growing particles ) 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, True) unb=unbalancedForce() if unb<0.001 and abs(-10000-triax.meanStress)/10000<0.001: break setContactFriction(radians(finalFricDegree)) ## ______________ Oedometer section _________________ #B. Activate flow engine and set boundary conditions in order to get permeability flow.dead=0 flow.defTolerance=-1 flow.meshUpdateInterval=-1 flow.useSolver=3 flow.permeabilityFactor=1 flow.viscosity=10 flow.bndCondIsPressure=[0,0,1,1,0,0] flow.bndCondValue=[0,0,1,0,0,0] flow.boundaryUseMaxMin=[0,0,0,0,0,0] O.dt=0.1e-3 O.dynDt=False O.run(1,1) csdList=flow.getConstrictionsFull() print(len(O.bodies),len(csdList),'finished') flow.dead=1 print(O.bodies[10].shape.radius) for i in range(10,100): O.bodies.erase(i) print(len(O.bodies)) del O.engines[3] O.engines=O.engines[0:3]+[FlowEngine(dead=0,label="flow"),]+O.engines[4:] O.run(1000,True) flow.dead=0 flow.defTolerance=-1 flow.meshUpdateInterval=-1 flow.useSolver=3 flow.permeabilityFactor=1 flow.viscosity=10 flow.bndCondIsPressure=[0,0,1,1,0,0] flow.bndCondValue=[0,0,1,0,0,0] flow.boundaryUseMaxMin=[0,0,0,0,0,0] O.run(1,1) #flow.updateTriangulation=True #force remeshing to reflect new BC immediately csdList1=flow.getConstrictionsFull() print(len(csdList1)) -- 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 : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp