缩尺模型发散

遇到一个奇怪的事情，在做模拟的时候，用足尺模型计算可以正常算，做缩尺模型的时候就会发散
我做的二维模拟，厚度方向只有一层网格，边界条件按论文设置的，论文用fluent算的缩尺模型，我放大到足尺模型算没有问题，但是按论文的尺寸算，第一步Uz就是solution singularity，算着算着epsilon就发散了，很奇怪。我用的simpleFoam，大家有啥建议吗，按理说应该能算啊。。。RAS { RASModel realizableKE; turbulence on; printCoeffs on; A0 4; C2 1.9; sigmak 1; sigmaEps 1.2; } No MRF models present No finite volume options present Starting time loop wallShearStress wallShearStress: processing all wall patches Time = 0.01 DILUPBiCGStab: Solving for Ux, Initial residual = 1, Final residual = 9.02931e11, No Iterations 5 DILUPBiCGStab: Solving for Uz: solution singularity GAMG: Solving for p, Initial residual = 1, Final residual = 0.0511143, No Iterations 14 GAMG: Solving for p, Initial residual = 9.35553e05, Final residual = 7.3953e06, No Iterations 2 time step continuity errors : sum local = 5.93648e05, global = 2.24242e05, cumulative = 2.24242e05 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.141893, Final residual = 1.91784e12, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 1, Final residual = 2.77584e10, No Iterations 5 ExecutionTime = 1.25 s ClockTime = 2 s Time = 0.02 DILUPBiCGStab: Solving for Ux, Initial residual = 0.527912, Final residual = 5.42646e12, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.587444, Final residual = 1.93572e11, No Iterations 5 GAMG: Solving for p, Initial residual = 0.0040408, Final residual = 0.000253175, No Iterations 4 GAMG: Solving for p, Initial residual = 0.00119141, Final residual = 0.000118566, No Iterations 6 time step continuity errors : sum local = 0.000903519, global = 0.000115926, cumulative = 9.35023e05 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.00632051, Final residual = 4.41338e13, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.93484, Final residual = 9.44193e11, No Iterations 5 ExecutionTime = 1.75 s ClockTime = 2 s Time = 0.03 DILUPBiCGStab: Solving for Ux, Initial residual = 0.296853, Final residual = 3.58872e10, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.358972, Final residual = 3.93449e10, No Iterations 5 GAMG: Solving for p, Initial residual = 0.0399261, Final residual = 0.00208552, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00341154, Final residual = 0.000273619, No Iterations 7 time step continuity errors : sum local = 0.00196847, global = 0.0002969, cumulative = 0.000390402 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.0295801, Final residual = 9.2042e13, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.171095, Final residual = 5.49745e10, No Iterations 5 ExecutionTime = 2.22 s ClockTime = 3 s Time = 0.04 DILUPBiCGStab: Solving for Ux, Initial residual = 0.136215, Final residual = 5.49597e11, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.31202, Final residual = 1.31588e10, No Iterations 5 GAMG: Solving for p, Initial residual = 0.130254, Final residual = 0.00470188, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00639474, Final residual = 0.000576745, No Iterations 8 time step continuity errors : sum local = 0.00159515, global = 0.000184109, cumulative = 0.000574511 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.0325781, Final residual = 7.34046e12, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.150909, Final residual = 1.5092e10, No Iterations 5 ExecutionTime = 2.72 s ClockTime = 3 s Time = 0.05 DILUPBiCGStab: Solving for Ux, Initial residual = 0.309871, Final residual = 7.73697e11, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.461963, Final residual = 1.28081e10, No Iterations 5 GAMG: Solving for p, Initial residual = 0.167412, Final residual = 0.00510895, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00610619, Final residual = 0.000483956, No Iterations 7 time step continuity errors : sum local = 0.00101936, global = 5.21071e05, cumulative = 0.000626618 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.00882784, Final residual = 7.51562e13, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.236641, Final residual = 6.08151e11, No Iterations 5 ExecutionTime = 3.2 s ClockTime = 3 s Time = 0.06 DILUPBiCGStab: Solving for Ux, Initial residual = 0.341882, Final residual = 1.0659e10, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.454444, Final residual = 1.41636e10, No Iterations 5 GAMG: Solving for p, Initial residual = 0.132903, Final residual = 0.00323376, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00381782, Final residual = 0.000236562, No Iterations 6 time step continuity errors : sum local = 0.000731669, global = 0.000105249, cumulative = 0.000521369 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.0075595, Final residual = 4.3385e12, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.192427, Final residual = 3.91865e10, No Iterations 5 ExecutionTime = 3.68 s ClockTime = 4 s Time = 0.07 DILUPBiCGStab: Solving for Ux, Initial residual = 0.282586, Final residual = 2.67545e10, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.35265, Final residual = 2.45834e10, No Iterations 5 GAMG: Solving for p, Initial residual = 0.151323, Final residual = 0.00331011, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00398265, Final residual = 0.000390266, No Iterations 5 time step continuity errors : sum local = 0.00105724, global = 8.7694e05, cumulative = 0.000433675 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.00759443, Final residual = 1.21657e12, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.18612, Final residual = 3.54752e11, No Iterations 5 ExecutionTime = 4.13 s ClockTime = 4 s Time = 0.08 DILUPBiCGStab: Solving for Ux, Initial residual = 0.213044, Final residual = 6.05622e11, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.28304, Final residual = 9.67631e11, No Iterations 5 GAMG: Solving for p, Initial residual = 0.189574, Final residual = 0.00373539, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00463947, Final residual = 0.000336507, No Iterations 7 time step continuity errors : sum local = 0.000557299, global = 5.79127e05, cumulative = 0.000375763 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.00781571, Final residual = 1.93204e12, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.138057, Final residual = 3.95958e11, No Iterations 5 ExecutionTime = 4.62 s ClockTime = 5 s Time = 0.09 DILUPBiCGStab: Solving for Ux, Initial residual = 0.237589, Final residual = 2.96319e11, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.243097, Final residual = 1.46831e10, No Iterations 5 GAMG: Solving for p, Initial residual = 0.180488, Final residual = 0.00312019, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00383925, Final residual = 0.00026896, No Iterations 7 time step continuity errors : sum local = 0.00035406, global = 2.62236e05, cumulative = 0.000349539 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.006831, Final residual = 3.72725e13, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.126435, Final residual = 2.17405e11, No Iterations 5 ExecutionTime = 5.09 s ClockTime = 5 s Time = 0.1 DILUPBiCGStab: Solving for Ux, Initial residual = 0.35012, Final residual = 3.04751e11, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.30704, Final residual = 8.67602e11, No Iterations 5 GAMG: Solving for p, Initial residual = 0.149198, Final residual = 0.00253316, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00305357, Final residual = 0.000284755, No Iterations 5 time step continuity errors : sum local = 0.000375062, global = 2.83423e05, cumulative = 0.000377881 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.00611188, Final residual = 1.87536e13, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.289974, Final residual = 2.50168e11, No Iterations 5 ExecutionTime = 5.88 s ClockTime = 6 s wallShearStress wallShearStress write: writing field wallShearStress min/max(down) = (2.87883 3.63059e22 0.0927051), (0.461882 3.65848e22 0.0998493) min/max(roof) = (17.9474 1.26777e18 3.09904), (0.42612 1.16826e18 6.57279) min/max(buildingWall) = (6.27984 1.34705e19 2.37151), (0.222287 1.01572e19 6.15707) Time = 0.11 DILUPBiCGStab: Solving for Ux, Initial residual = 0.531763, Final residual = 2.03224e12, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.56992, Final residual = 2.11653e12, No Iterations 5 GAMG: Solving for p, Initial residual = 0.153026, Final residual = 0.00256444, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00310925, Final residual = 0.000212052, No Iterations 7 time step continuity errors : sum local = 0.00026462, global = 1.89049e05, cumulative = 0.000396786 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.0049126, Final residual = 9.09796e14, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.282556, Final residual = 9.72273e13, No Iterations 5 ExecutionTime = 6.4 s ClockTime = 7 s Time = 0.12 DILUPBiCGStab: Solving for Ux, Initial residual = 0.23185, Final residual = 1.68742e11, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.377097, Final residual = 1.61394e11, No Iterations 5 GAMG: Solving for p, Initial residual = 0.175782, Final residual = 0.0040422, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00486161, Final residual = 0.000340632, No Iterations 5 time step continuity errors : sum local = 0.000478204, global = 5.30041e05, cumulative = 0.00044979 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.00552237, Final residual = 1.23137e13, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.394754, Final residual = 2.5363e11, No Iterations 5 ExecutionTime = 6.84 s ClockTime = 7 s Time = 0.13 DILUPBiCGStab: Solving for Ux, Initial residual = 0.379743, Final residual = 1.63324e11, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.230827, Final residual = 4.62169e12, No Iterations 5 GAMG: Solving for p, Initial residual = 0.207157, Final residual = 0.00627811, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00764946, Final residual = 0.000568072, No Iterations 7 time step continuity errors : sum local = 0.000345064, global = 3.01655e05, cumulative = 0.000479956 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.00351726, Final residual = 8.00546e14, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.386289, Final residual = 1.57371e13, No Iterations 5 ExecutionTime = 7.33 s ClockTime = 8 s Time = 0.14 DILUPBiCGStab: Solving for Ux, Initial residual = 0.649438, Final residual = 4.46392e16, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.506957, Final residual = 1.07223e16, No Iterations 5 GAMG: Solving for p, Initial residual = 0.156169, Final residual = 0.00375195, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00165985, Final residual = 0.000160854, No Iterations 3 time step continuity errors : sum local = 0.00058144, global = 7.92418e06, cumulative = 0.00048788 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.00170993, Final residual = 2.94273e17, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.329833, Final residual = 1.51244e18, No Iterations 5 ExecutionTime = 7.77 s ClockTime = 8 s Time = 0.15 DILUPBiCGStab: Solving for Ux, Initial residual = 0.571959, Final residual = 3.32197e16, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.458761, Final residual = 1.52795e17, No Iterations 5 GAMG: Solving for p, Initial residual = 0.0452743, Final residual = 0.00151925, No Iterations 1 GAMG: Solving for p, Initial residual = 0.00267839, Final residual = 0.000230421, No Iterations 1 time step continuity errors : sum local = 0.00342145, global = 1.32423e05, cumulative = 0.000474638 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.000546564, Final residual = 2.02553e17, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.130893, Final residual = 2.82138e19, No Iterations 5 ExecutionTime = 8.17 s ClockTime = 8 s Time = 0.16 DILUPBiCGStab: Solving for Ux, Initial residual = 0.463509, Final residual = 1.57563e17, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.509736, Final residual = 4.59172e18, No Iterations 5 GAMG: Solving for p, Initial residual = 0.134174, Final residual = 0.00768087, No Iterations 2 GAMG: Solving for p, Initial residual = 0.00363852, Final residual = 0.000201176, No Iterations 4 time step continuity errors : sum local = 0.0210048, global = 0.000201257, cumulative = 0.000273381 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.00400355, Final residual = 8.29593e18, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.366453, Final residual = 1.20683e18, No Iterations 5 ExecutionTime = 8.63 s ClockTime = 9 s Time = 0.17 DILUPBiCGStab: Solving for Ux, Initial residual = 0.267952, Final residual = 4.29013e23, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.540221, Final residual = 5.71911e22, No Iterations 5 GAMG: Solving for p, Initial residual = 0.123787, Final residual = 0.00286107, No Iterations 1 GAMG: Solving for p, Initial residual = 6.716e05, Final residual = 3.30864e06, No Iterations 6 time step continuity errors : sum local = 1172.79, global = 133.626, cumulative = 133.626 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.00118844, Final residual = 9.31074e18, No Iterations 5 DILUPBiCGStab: Solving for k, Initial residual = 0.43358, Final residual = 1.23182e16, No Iterations 5 ExecutionTime = 9.1 s ClockTime = 9 s Time = 0.18 DILUPBiCGStab: Solving for Ux, Initial residual = 0.699964, Final residual = 2.85242e22, No Iterations 5 DILUPBiCGStab: Solving for Uz, Initial residual = 0.654102, Final residual = 3.34865e22, No Iterations 5 GAMG: Solving for p, Initial residual = 0.1765, Final residual = 8.0125e05, No Iterations 1 GAMG: Solving for p, Initial residual = 0.332435, Final residual = 0.0152816, No Iterations 1 time step continuity errors : sum local = 7.41639e+18, global = 2.63517e+13, cumulative = 2.63517e+13 DILUPBiCGStab: Solving for epsilon, Initial residual = 2.32053e07, Final residual = 1.76158e19, No Iterations 5 bounding epsilon, min: 70.8119 max: 8.51758e+10 average: 6.33029e+06 DILUPBiCGStab: Solving for k, Initial residual = 1, Final residual = 4.21351e16, No Iterations 5 ExecutionTime = 9.51 s ClockTime = 10 s

似乎是网格尺寸的原因，我把速度缩小１０倍，能算了，说明以前的Ｙ+可能有问题

感觉是不是fluent有什么黑科技，在fluent里能算，在of里发散了。。
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