New question #695065 on Yade: https://answers.launchpad.net/yade/+question/695065
Hello, I am trying to run a TH analysis with warm fluid going through a cold pack of polydisperse particles using the provided example in [1]. When I use a previously compacted, poly-disperse-particle sample for this analysis, the temperature of all particles remains constant at first and then turns to "nan". I was wondering what needs to be adjusted in the thermal and flow engines following the features of the granular sample under study. The compacted sample can be found here: https://drive.google.com/file/d/1Bg-TxgnM4DNe_7t8_QOghIxuspoZiY5T/view?usp=sharing [1] https://gitlab.com/yade-dev/trunk/-/commit/f0c96c63937a666d1fa1529173b554ac74b04456 The MWE follows: Thanks - Zoheir ###------TH analyses--------### from yade import pack, ymport from yade import timing import numpy as np import shutil young=1e9 rad=0.003 mn,mx=Vector3(0.0003548178,0.0003386574,0.0007729061),Vector3(0.0014559856,0.0013972314,0.0018823562999999998) # corners of the initial packing thermalCond = 2. #W/(mK) heatCap = 710. #J(kg K) t0 = 333.15 #K # micro properties r = rad k = 2.0 # 2*k*r Cp = 710. rho = 2600. D = 2.*r m = 4./3.*np.pi*r**2/rho # macro diffusivity O.materials.append(FrictMat(young=young,poisson=0.5,frictionAngle=radians(3),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 = O.bodies.append(ymport.textExt('ShCube', 'x_y_z_r',color=(0.1,0.1,0.9), material='spheres')) ThermalEngine = ThermalEngine(dead=1,label='thermal'); newton=NewtonIntegrator(damping=0.2) intRadius = 1 O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=intRadius),Bo1_Box_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom(interactionDetectionFactor=intRadius),Ig2_Box_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys()], [Law2_ScGeom_FrictPhys_CundallStrack()],label="iloop" ), FlowEngine(dead=1,label="flow",multithread=False), ThermalEngine, GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=100,timestepSafetyCoefficient=0.8), newton ] for b in O.bodies: if isinstance(b.shape, Sphere): b.dynamic=False # mechanically static flow.dead=0 flow.defTolerance=-1#0.3 flow.meshUpdateInterval=200 flow.useSolver=4 flow.permeabilityFactor= 1 flow.viscosity= 0.001 flow.bndCondIsPressure=[1,1,0,0,0,0] flow.bndCondValue=[10,0,0,0,0,0] flow.thermalEngine=True flow.debug=False flow.fluidRho = 997 flow.fluidCp = 4181.7 flow.getCHOLMODPerfTimings=True flow.bndCondIsTemperature=[1,0,0,0,0,0] flow.thermalEngine=True flow.thermalBndCondValue=[343.15,0,0,0,0,0] flow.tZero=t0 flow.pZero=0 #flow.clampKValues=False flow.maxKdivKmean=1 flow.minKdivmean=0.0001; thermal.dead=0 thermal.debug=False thermal.fluidConduction=True thermal.ignoreFictiousConduction=False#True #thermal.minimumFluidCondDist=1.89e-5 thermal.conduction=True thermal.thermoMech=False thermal.solidThermoMech = False thermal.fluidThermoMech = False thermal.advection=True thermal.bndCondIsTemperature=[0,0,0,0,0,0] thermal.thermalBndCondValue=[0,0,0,0,0,0] thermal.fluidK = 0.6069#0.650 thermal.fluidConductionAreaFactor=1. thermal.particleT0 = t0 thermal.particleDensity=2600. thermal.particleK = thermalCond thermal.particleCp = heatCap thermal.useKernMethod=True #thermal.useHertzMethod=False timing.reset() O.dt=0.1e-5 O.dynDt=False O.run(1,1) flow.dead=0 def bodyByPos(x,y,z): cBody = O.bodies[1] cDist = Vector3(100,100,100) for b in O.bodies: if isinstance(b.shape, Sphere): dist = b.state.pos - Vector3(x,y,z) if np.linalg.norm(dist) < np.linalg.norm(cDist): cDist = dist cBody = b print('found closest body ', cBody.id, ' at ', cBody.state.pos) return cBody # Finding a body at the X flow boundary bodyOfInterest = bodyByPos(0.00035,0.001,0.001) from yade import plot def history(): print(bodyOfInterest.state.temp) plot.addData( ftemp1=flow.getPoreTemperature((0.00035,0.001,0.001)), t=O.time, i = O.iter, bodyOfIntTemp = O.bodies[bodyOfInterest.id].state.temp ) O.engines=O.engines+[PyRunner(iterPeriod=5,command='history()',label='recorder')] plot.plots={'t':(('ftemp1','k-'),('bodyOfIntTemp','r-'))} # plot.plot() O.saveTmp() def ColorScaler(): for s in O.bodies: s.shape.color=scalarOnColorScale(s.state.temp,333,343) O.engines=O.engines+[PyRunner(command='ColorScaler()',iterPeriod=1)] ColorScaler() O.run(1000) -- 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
