Question #695065 on Yade changed: https://answers.launchpad.net/yade/+question/695065
Description changed to: 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. [1] https://gitlab.com/yade-dev/trunk/-/blob/master/examples/ThermalEngine/flowScenario.py The MWE follows: Thanks - Zoheir from yade import pack, ymport from yade import timing import numpy as np import shutil young=1e9 rad=0.003 mn,mx=Vector3(0.0005944,0.0005596,0.00099759),Vector3(0.00119,0.00119,0.0016) # 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')) O.bodies.append([ sphere((0.000945595,0.000784186,0.00149986),0.0000875846), sphere((0.000778022,0.000753066,0.00145943),0.0000875846), sphere((0.000888722,0.000810072,0.00133622),0.0000875846), sphere((0.000903823,0.000647224,0.00139896),0.0000875846), sphere((0.00105629,0.000841192,0.00137666),0.0000875846), sphere((0.00101452,0.00070423,0.00127576),0.0000875846), sphere((0.00084695,0.00067311,0.00123532),0.0000875846), sphere((0.000999422,0.000867078,0.00121301),0.0000875846), sphere((0.00103358,0.00108745,0.0011483),0.0000815788), sphere((0.000902032,0.00103675,0.00153707),0.0000735711), sphere((0.000986413,0.00091621,0.00153692),0.0000735711), sphere((0.00111325,0.000915283,0.00146233),0.0000735711), sphere((0.00108202,0.000666186,0.00154242),0.0000665643), sphere((0.00111005,0.000740653,0.00132599),0.0000665643), sphere((0.00080908,0.00109404,0.0014756),0.0000499888), sphere((0.000751015,0.00103522,0.00153186),0.0000499888), sphere((0.000670623,0.00108745,0.00150348),0.0000499888), sphere((0.000687866,0.00108202,0.00126569),0.0000459731), sphere((0.000703081,0.00107221,0.00135584),0.0000459731), sphere((0.00110443,0.00083307,0.00156066),0.0000420579), sphere((0.00112293,0.000765198,0.00151454),0.0000420579), sphere((0.00106475,0.000819695,0.0014877),0.0000420579), sphere((0.0011389,0.000814544,0.00144832),0.0000420579), sphere((0.00112143,0.000746581,0.00109922),0.0000439814), sphere((0.00105308,0.000800634,0.00111123),0.0000439814), sphere((0.00110668,0.000870009,0.00110401),0.0000439814), sphere((0.00112389,0.000807084,0.00116302),0.0000439814), sphere((0.00103833,0.000924061,0.00111603),0.0000439814), sphere((0.000792443,0.000977976,0.00151641),0.0000220555), sphere((0.000760407,0.000979304,0.00148612),0.0000220555), sphere((0.000836178,0.000937735,0.0014684),0.0000220555), sphere((0.000775855,0.00092188,0.00146726),0.0000220555), sphere((0.000798293,0.000958519,0.00147726),0.0000220555), sphere((0.00073797,0.000942664,0.00147612),0.0000220555), sphere((0.000766257,0.000959847,0.00144696),0.0000220555), sphere((0.000728372,0.000980632,0.00145582),0.0000220555), sphere((0.00081374,0.000901096,0.0014584),0.0000220555), sphere((0.000842027,0.000918279,0.00142924),0.0000220555), sphere((0.000781704,0.000902424,0.00142811),0.0000220555), sphere((0.000804142,0.000939063,0.0014381),0.0000220555), sphere((0.000772106,0.000940391,0.00140781),0.0000220555), sphere((0.000734221,0.000961175,0.00141667),0.0000220555), sphere((0.000809991,0.000919607,0.00139895),0.0000220555), sphere((0.00113905,0.00100891,0.00119864),0.0000235576), sphere((0.000698534,0.000815074,0.00126433),0.0000765702), sphere((0.000695882,0.00071517,0.00138037),0.0000765702), sphere((0.000670978,0.000701228,0.00116568),0.0000765702), sphere((0.000683566,0.000664341,0.00153398),0.0000481936), sphere((0.00113412,0.000910585,0.00138428),0.000040366), sphere((0.00112752,0.00102435,0.0013913),0.000040366), sphere((0.0011135,0.000914201,0.0013063),0.000040366), sphere((0.00100741,0.000944425,0.00133576),0.000040366), sphere((0.00108155,0.000966389,0.00135897),0.000040366), sphere((0.0011069,0.00102797,0.00131333),0.000040366), sphere((0.00102898,0.00102219,0.00133366),0.000040366), sphere((0.00107495,0.00108015,0.00136599),0.000040366), sphere((0.00112847,0.00110573,0.00131123),0.000040366), sphere((0.00113885,0.000975778,0.00126066),0.000040366), sphere((0.00106093,0.000970005,0.001281),0.000040366), sphere((0.00105433,0.00108377,0.00128802),0.000040366), sphere((0.000905936,0.000944606,0.00110321),0.000105624), sphere((0.000756408,0.00108773,0.00114542),0.000105624), sphere((0.00074381,0.000861183,0.00150084),0.0000322503), sphere((0.000794579,0.000887874,0.00153035),0.0000322503), sphere((0.000828512,0.000858476,0.00142805),0.0000322503), sphere((0.000884233,0.00108217,0.00130317),0.000033125), sphere((0.000901453,0.00111232,0.00135959),0.000033125), sphere((0.000690365,0.00103048,0.00144934),0.0000328425), sphere((0.000744769,0.00106632,0.00144098),0.0000328425), sphere((0.000777308,0.000901361,0.00119494),0.000045), sphere((0.000928126,0.00101227,0.00131929),0.000045), sphere((0.000844602,0.000967877,0.00126048),0.000045), sphere((0.00102741,0.000992656,0.00113012),0.000045), sphere((0.000758144,0.000949585,0.00128654),0.000045), sphere((0.00100301,0.00111497,0.00140571),0.000045), sphere((0.000824715,0.00100449,0.0014298),0.000045), sphere((0.00101191,0.000708242,0.00142522),0.000045), sphere((0.000932121,0.000920137,0.00140155),0.000045), sphere((0.000815047,0.00105458,0.00135521),0.000045), ]) 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=-1 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.maxKdivKmean=1 flow.minKdivmean=0.0001; thermal.dead=0 thermal.debug=False thermal.fluidConduction=True thermal.ignoreFictiousConduction=True 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 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. 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