XFlow2011-10-DPM-wgb

™培训第10章DiscretePhaseModel离散相模型群QQ：200378871设尔易科技•XFlowallowstosimulateadiscretesecondphaseconsistingofsphericalparticles(droplets,dust,bubbles,etc)dispersedinthecontinuousphase•Xflow可模拟连续相介质流动中分散的离散相（球粒、液滴、气泡、尘埃等等）•One-waycoupling:单向耦合-Fluidflowinfluencesparticlesviadragandturbulence通过阻力和湍流作用于粒子-Particleshavenoinfluenceonthefluidflow粒子对流场没有影响•Noparticle-particlecollisions无粒子间的碰撞作用•Transient:eachparticleadvancesintimealongwiththeflow每个粒子随着流动场瞬态变化•Steady:velocityfieldatareferenceframe稳态：参考帧的速度场•Dispersionofparticlesduetoturbulentfluctuations(onlywhenaveragedandstandarddeviationresultshavebeensaved)湍流脉动促使粒子的分散•Particlestreamsareinjectedfromashape从形状上注入粒子流10–DiscretePhaseModelContinuousphaseflowfield连续相流场Particletrajectory粒子轨迹粘性模拟Source源Inlet入口Numberoftracers迹线数Particlesfluxrate粒子流率Particleproperties粒子特性Density(ρp)密度Diameter(fordragcoefficientFD)直径Standarddeviation(inparticlediameter)标准偏差Restitutioncoefficient(forcollisionwithsurfaces)恢复系数Velocitylaws(initialvelocity)初始速度Accelerationlaws(a1anda2)加速度Timing时间Transient:Off/On瞬态开关Coloredbyfield颜色场Data数据10–DiscretePhaseModel21)()(aauuFtdudppDpRestitutioncoefficient=0Restitutioncoefficient=0.5Restitutioncoefficient=1:Off/OnColoredbyfieldData10–DiscretePhaseModelNumberoftracers=0producesstreamtracersatrandompositionsonthespecifiedinlet0个迹线表示在入口随意位置指定流迹Fluxrate=0generatesjustonesequenceofparticles流率=0，表示只产生一个序列的粒子Transient:OffReferenceframeTimeTransient:OnInitialframeLastframe出口测量粒子RightclickinFunctionViewerDatastreamtracersTracer#Outletparticlesflux10–DiscretePhaseModelparticle_x,_y,_zfluid_px,_py,_pzparticle_vx,_vy,_vzfluid_vx,_vy,_vzparticle_tfluid_spfluid_vrt