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    OpenFoam计算域大小尺寸单位怎么看啊

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    • 心
      心里的小漩涡 last edited by

      OpenFoam里面默认应该是国际标准单位吧,不知道单位尺度怎么改,在学习基础算例不知道几何尺寸大小,湍动能和耗散率边界条件就计算不了,自己给的值一直发散,求解答

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        veen @心里的小漩涡 last edited by

        @心里的小漩涡
        etc/controDict可以找到

            unitSet SI; // USCS
        
            SICoeffs
            {
                // Basic units
                kg  kg  [1 0 0 0 0 0 0] 1.0;
                m   m   [0 1 0 0 0 0 0] 1.0;
                s   s   [0 0 1 0 0 0 0] 1.0;
                K   K   [0 0 0 1 0 0 0] 1.0;
                mol mol [0 0 0 0 1 0 0] 1.0;
                A   A   [0 0 0 0 0 1 0] 1.0;
                Cd  Cd  [0 0 0 0 0 0 1] 1.0;
        
                // Derived units
                Hz  Hz  [s^-1] 1.0;
                N   N   [kg m s^-2] 1.0;
                Pa  Pa  [N m^-2] 1.0;
                J   J   [N m] 1.0;
                W   W   [J s^-1] 1.0;
        
                // Some non-symbolic ones
                area area [m^2] 1.0;
                volume volume [m^3] 1.0;
                density density [kg m^-3] 1.0;
                acceleration acceleration  [m s^-2] 1.0;
                kinematicPressure kinematicPressure [Pa density^-1] 1.0;
        
                // Scaled units. Only allowed in dimensionedType (dimensionedScalar,
                // dimensionedVector etc.) and UniformDimensionedField, not
                // in DimensionedField or GeometricField
                cm  cm  [m] 1e-2;
                mm  mm  [m] 1e-3;
                km  km  [m] 1e3;
        
                // Set of units used for printing. Can be any basic or derived
                // but not scaled (only supported for dimensionedScalar, etc)
                //writeUnits (kg m s K mol A Cd);
            }
        
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        • 心
          心里的小漩涡 @veen last edited by

          @veen 谢谢大佬,请问那像网格尺寸单位这样再这里怎么修改啊

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          • 心
            心里的小漩涡 @veen last edited by

            @veen 我在计算雷诺数或者给进口湍流度时,网格是默认标准国际单位吗

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              veen @心里的小漩涡 last edited by

              @心里的小漩涡 默认单位是m,可以使用convertToMeters 0.001;进行设置

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              • V
                veen @心里的小漩涡 last edited by

                @心里的小漩涡 刚刚说的是网格,其他的一般都是国际标准单位

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                • 心
                  心里的小漩涡 @veen last edited by

                  @veen 多谢大佬!^O^/

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