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    OF中如何计算得到壁面摩擦应力呢?

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    • A
      Aeronastro last edited by

      就是tau_w是如何计算得到的,wallShearStress得到的是一个vectorField,是一个正应力和两个切应力,但我们所用的这个值应该是个标量吧,比如计算Cf时用的是tau_w/(0.5rhoU*U)。

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        wwzhao 教授 @Aeronastro last edited by

        @Aeronastro 应该用wallGradU

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          Aeronastro @wwzhao last edited by

          @wwzhao 用wallGrandU求出之后再乘以mu_w就可以了是吧

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            Aeronastro @wwzhao last edited by

            @wwzhao 我看了一下,求出的是x, y, z 三个分量,我是否要求模呢?

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              wwzhao 教授 @Aeronastro last edited by wwzhao

              @Aeronastro 我认为你应该求垂直壁面的分量,然后用这个分量去乘以 $\mu$ 。

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                Aeronastro @wwzhao last edited by

                @wwzhao 嗯嗯,我看了一下源码,这个wallGradU求的就是sngrad,我想它的三个应该就是snGrad在绝对坐标系下的分量吧

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                  Aeronastro @wwzhao last edited by

                  @wwzhao 就是说wallGradU求出的就是壁面法向的梯度

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                    wwzhao 教授 @Aeronastro last edited by

                    @Aeronastro 没错

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                      ahujeffery @Aeronastro last edited by

                      @aeronastro 您好,使用wallgradu求出的结果是个张量,要提取法向的乘以miu吗?还有一个问题请教您,wallgradu的源代码在哪里?

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