[交流] fluen中的UDF程序问题 已有1人参与

模拟往复式压缩机出口管道需要添加一个脉动的压力，脉动形式如图所示，表达式也在下面，周期是0.3s，针对这个问题，由于刚上手fluent不久，对UDF功能也不是很熟，外加C语言也很菜，于是仿照别人的程序编了一段，大家看能实现图示和表达式所需要的脉动压力吗？我的fluent开始算了，看监测点的曲线 好像开始就有脉动了，估计有问题啊 想听听大牛们的意见啊 程序： /* unsteady.c */ /* UDF for specifying a transient pressure profile boundary condition */ #include "udf.h" DEFINE_PROFILE(unsteady_pressure,thread,position) { face_t f; begin_f_loop(f,thread) { real t=RP_Get_Real("flow-time"; int k; for(k=0;k<=9;k=k+1) { if(t>=0.3*k&&t<0.225+0.3*k) F_PROFILE(f,thread,position)=310000000; else F_PROFILE(f,thread,position)=310000000*(1+0.06*sin(2*(20.93*t-4.71))); } } end_f_loop(f,thread) } 模拟过程中设置监测点，结果监测点曲线如下附图，监测数据："Convergence history of Static Pressure on point-1 (in SI units)" "Flow Time" "Vertex Average Static Pressure" 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0020000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0030000001 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0040000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.099111e+08 0.0050000002 3.0991114e+08 0.0060000003 3.0991114e+08 0.0060000003 3.0991114e+08 0.0060000003 3.0991114e+08 0.0060000003 3.0991114e+08 0.0060000003 3.0991114e+08 0.0060000003 3.0991114e+08 0.0060000003 3.0991114e+08 0.0060000003 3.0991114e+08 0.0060000003 3.0991114e+08 0.0060000003 3.0991114e+08 0.0060000003 3.0991114e+08 0.0060000003 3.0991117e+08 0.0060000003 3.0991117e+08 0.0060000003 3.099112e+08 0.0060000003 3.099112e+08 0.0060000003 3.0991123e+08 0.0060000003 3.099113e+08 0.0060000003 3.0991142e+08 0.0060000003 3.0991155e+08 0.0060000003 3.0991168e+08 0.0060000003 3.0991187e+08 0.0070000003 3.0991187e+08 0.0070000003 3.0991216e+08 0.0070000003 3.0991248e+08 0.0070000003 3.0991293e+08 0.0070000003 3.099135e+08 0.0070000003 3.0991421e+08 0.0070000003 3.0991498e+08 0.0070000003 3.0991587e+08 0.0070000003 3.099169e+08 0.0070000003 3.0991805e+08 0.0070000003 3.0991936e+08 0.0070000003 3.099208e+08 0.0070000003 3.0992243e+08 0.0070000003 3.0992416e+08 0.0070000003 3.0992598e+08 0.0070000003 3.0992797e+08 0.0070000003 3.0993011e+08 0.0070000003 3.0993235e+08 0.0070000003 3.0993466e+08 0.0070000003 3.0993709e+08 0.0070000003 3.0993962e+08 0.0080000004 3.0993962e+08 0.0080000004 3.0994237e+08 0.0080000004 3.0994541e+08 0.0080000004 3.099487e+08 0.0080000004 3.0995213e+08 0.0080000004 3.0995571e+08 0.0080000004 3.0995946e+08 0.0080000004 3.0996333e+08 0.0080000004 3.0996723e+08 0.0080000004 3.099712e+08 0.0080000004 3.099752e+08 0.0080000004 3.0997923e+08 0.0080000004 3.0998323e+08 0.0080000004 3.099873e+08 0.0080000004 3.099913e+08 0.0080000004 3.099953e+08 0.0080000004 3.0999933e+08 0.0080000004 3.1000326e+08 0.0080000004 3.1000717e+08 0.0080000004 3.1001104e+08 0.0080000004 3.1001491e+08 0.0090000004 3.1001491e+08 0.0090000004 3.1001882e+08 0.0090000004 3.1002288e+08 0.0090000004 3.1002694e+08 0.0090000004 3.1003114e+08 0.0090000004 3.1003533e+08 0.0090000004 3.1003958e+08 0.0090000004 3.1004384e+08 0.0090000004 3.1004813e+08 0.0090000004 3.1005238e+08 0.0090000004 3.1005664e+08 0.0090000004 3.1006086e+08 0.0090000004 3.1006506e+08 0.0090000004 3.1006918e+08 0.0090000004 3.1007328e+08 0.0090000004 3.1007731e+08 0.0090000004 3.1008128e+08 0.0090000004 3.1008525e+08 0.0090000004 3.1008909e+08 0.0090000004 3.100929e+08 0.0090000004 3.1009664e+08 0.01 3.1009664e+08 0.01 3.1010042e+08 0.01 3.1010413e+08 0.01 3.1010784e+08 0.01 3.1011146e+08 0.01 3.101151e+08 0.01 3.1011869e+08 0.01 3.1012224e+08 0.01 3.1012573e+08 0.01 3.1012918e+08 0.01 3.1013264e+08 0.01 3.1013606e+08 0.01 3.1013946e+08 0.01 3.1014278e+08 0.01 3.1014614e+08 0.01 3.1014944e+08 0.01 3.101527e+08 0.01 3.1015594e+08 0.01 3.1015917e+08 0.01 3.1016234e+08 0.01 3.101655e+08 0.011000001 3.101655e+08 0.011000001 3.1016867e+08 。。。。。。 ------------------------------------------------------ 结果应该不对，没能实现需要的压力曲线啊 ，有懂UDF程序的大牛们 指导下俺吧 ，愁死了。。。。 压力曲线 压力表达式 监测点压力曲线 [ Last edited by bwj0319 on 2012-7-29 at 21:46 ]

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