Fluent入门验证案例 | 扩散管内流动仿真
本案例为入门案例，对在轴对称扩散器中对完全发展的湍流进行建模。对气流在入口处完全发展到扩散器进行仿真计算。并对沿发散扩散器壁的压力系数比较进行监测，与文献的计算结果进行比较，实现对仿真计算准确性的验证。适合fluent初学者练手使用。
1 workbench 设置
本案例具体设置如下图：
workbench设置示意图
2 FLUENT 设置
2.1 General设置与网格导入
首先导入网格，然后勾选为稳态计算，并选择压力基求解器。并选择轴对称选项。
通用设置示意图
2.2 材料设置
依据相关文献中的数据，对材料进行设置，密度为1，年粘度为1.64e-5，相关设置如下如所示：
流体材料设置示意图
2.3 模型设置
本案例所选用的模型为ke模型，相关设置如下图所示：
湍流模型设置示意图
2.4 边界条件设置
首先将prof文件导入，具体的prof文件内容如下图：
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0.000000e+00)
(eps
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4.727938e-02 4.238709e-02 3.799547e-02 3.463551e-02 3.258848e-02
3.191992e-02)
(omega
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1.570198e-03 1.628540e-03 1.689989e-03 1.754727e-03 1.822949e-03
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3.608498e-03 3.782174e-03 3.966112e-03 4.160971e-03 4.367453e-03
4.586304e-03 4.818328e-03 5.064380e-03 5.325370e-03 5.602280e-03
5.896147e-03 6.208089e-03 6.539295e-03 6.891043e-03 7.264696e-03
7.661708e-03 8.083642e-03 8.532165e-03 9.009068e-03 9.516259e-03
1.005578e-02 1.062983e-02 1.124076e-02 1.189108e-02 1.258349e-02
1.332086e-02 1.410630e-02 1.494312e-02 1.583490e-02 1.678543e-02
1.779881e-02 1.887943e-02 2.003202e-02 2.126163e-02 2.257370e-02
2.397406e-02 2.546898e-02 2.706521e-02 2.876998e-02 3.059110e-02
3.253691e-02 3.461643e-02 3.683938e-02 3.921615e-02 4.175806e-02
4.447713e-02 4.738642e-02 5.050001e-02 5.383307e-02 5.740191e-02
6.122413e-02 6.531890e-02 6.970661e-02 7.440966e-02 7.945187e-02
8.485933e-02 9.066013e-02 9.688447e-02 1.035654e-01 1.107384e-01
1.184424e-01 1.267192e-01 1.356138e-01 1.451760e-01 1.554593e-01
1.665219e-01 1.784270e-01 1.912437e-01 2.050471e-01 2.199187e-01
2.359480e-01 2.532321e-01 2.718769e-01 2.919993e-01 3.137259e-01
3.371953e-01 3.625605e-01 3.899870e-01 4.196593e-01 4.517774e-01
4.865634e-01 5.242609e-01 5.651351e-01 6.094827e-01 6.576303e-01
7.099378e-01 7.668023e-01 8.286635e-01 8.960145e-01 9.693918e-01
1.049405e+00 1.136724e+00 1.232093e+00 1.336356e+00 1.450443e+00
1.575409e+00 1.712430e+00 1.862847e+00 2.028156e+00 2.210071e+00
2.410522e+00 2.631749e+00 2.876291e+00 3.147084e+00 3.447584e+00
3.781736e+00 4.154284e+00 4.570789e+00 5.037940e+00 5.563702e+00
6.157894e+00 6.832498e+00 7.602315e+00 8.485850e+00 9.506585e+00
1.069429e+01 1.208715e+01 1.373530e+01 1.570393e+01 1.807996e+01
2.097991e+01 2.456162e+01 2.904251e+01 3.472856e+01 4.205991e+01
5.169973e+01 6.470889e+01 8.293745e+01 1.099508e+02 1.534119e+02
2.316831e+02 3.951550e+02 8.100399e+02 2.215461e+03 1.085578e+04
3.546658e+05)
(v2
0.000000e+00 2.513480e-03 2.529344e-03 2.545188e-03 2.561003e-03
2.576780e-03 2.592509e-03 2.608184e-03 2.623796e-03 2.639334e-03
2.654793e-03 2.670164e-03 2.685439e-03 2.700609e-03 2.715668e-03
2.730609e-03 2.745423e-03 2.760106e-03 2.774649e-03 2.789045e-03
2.803290e-03 2.817378e-03 2.831302e-03 2.845056e-03 2.858637e-03
2.872040e-03 2.885259e-03 2.898290e-03 2.911129e-03 2.923772e-03
2.936217e-03 2.948459e-03 2.960495e-03 2.972323e-03 2.983940e-03
2.995344e-03 3.006532e-03 3.017503e-03 3.028254e-03 3.038784e-03
3.049092e-03 3.059176e-03 3.069035e-03 3.078669e-03 3.088075e-03
3.097254e-03 3.106204e-03 3.114925e-03 3.123416e-03 3.131676e-03
3.139705e-03 3.147501e-03 3.155065e-03 3.162395e-03 3.169490e-03
3.176350e-03 3.182974e-03 3.189358e-03 3.195503e-03 3.201406e-03
3.207067e-03 3.212481e-03 3.217647e-03 3.222562e-03 3.227223e-03
3.231626e-03 3.235766e-03 3.239640e-03 3.243242e-03 3.246566e-03
3.249606e-03 3.252355e-03 3.254806e-03 3.256950e-03 3.258778e-03
3.260279e-03 3.261444e-03 3.262260e-03 3.262714e-03 3.262794e-03
3.262485e-03 3.261772e-03 3.260640e-03 3.259072e-03 3.257052e-03
3.254562e-03 3.251585e-03 3.248105e-03 3.244106e-03 3.239572e-03
3.234490e-03 3.228847e-03 3.222632e-03 3.215836e-03 3.208457e-03
3.200489e-03 3.191934e-03 3.182796e-03 3.173082e-03 3.162803e-03
3.151972e-03 3.140605e-03 3.128720e-03 3.116333e-03 3.103465e-03
3.090130e-03 3.076342e-03 3.062111e-03 3.047436e-03 3.032313e-03
3.016721e-03 3.000630e-03 2.983991e-03 2.966738e-03 2.948786e-03
2.930020e-03 2.910306e-03 2.889481e-03 2.867351e-03 2.843696e-03
2.818262e-03 2.790770e-03 2.760910e-03 2.728354e-03 2.692753e-03
2.653748e-03 2.610976e-03 2.564084e-03 2.512743e-03 2.456645e-03
2.395550e-03 2.329262e-03 2.257672e-03 2.180748e-03 2.098570e-03
2.011297e-03 1.919194e-03 1.822622e-03 1.722024e-03 1.617892e-03
1.510778e-03 1.401268e-03 1.289916e-03 1.177304e-03 1.063965e-03
9.504224e-04 8.372119e-04 7.249176e-04 6.142471e-04 5.062066e-04
4.022492e-04 3.045122e-04 2.159411e-04 1.401467e-04 8.063348e-05
3.941013e-05 1.542601e-05 4.412643e-06 7.604023e-07 4.147692e-08
0.000000e+00)
)
|
对速度入口边界进行设置，轴向速度设置为inlet u，径向速度设置为0，具体设置如下图：
速度入口边界动量设置示意图
其次对压力出口边界展开设置，相关的设置如下图所示：
压力出口边界动量设置示意图
2.5 初始化设置
进行标准初始化设置，具体设置如下图：
混合初始化设置示意图
2.6 计算设置
此处进行的计算设置如下：
运行计算设置示意图
3 后处理结果
3.1 后处理结果
对扩散管内的仿真计算结果进行可视化处理，其速度云如下图所示：
速度可视化云图
3.2 计算结果对比
对扩散管壁压力系数进行计算，可以得到如下图所示的结果，由图可以发现，该结果与Fluent官方案例的结果一致：
扩散管壁压力系数仿真计算结果
| 
文献计算结果
|
