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梯度、散度、旋度总结

时间:2023-03-20 19:57:49浏览次数:37  
标签:right frac 旋度 梯度 定理 散度 vec partial left

梯度、散度、旋度总结

散度定理(Gauss定理):穿过整个体积表面\(\partial V\)(闭曲面)的通量等于其体积微元散度之和,即

\[\oint_{\partial V} \vec{F} \cdot \vec{n} d S=\oint_V \operatorname{div} \vec{F} d V \]

三维Gauss定理:

\[\iint_{\partial V} f_1 d y d z+f_2 d z d x+f_3 d x d y=\iiint_{V}\left(\frac{\partial f_1}{\partial x}+\frac{\partial f_2}{\partial y}+\frac{\partial f_3}{\partial z}\right) d x d y d z \]

旋度定理:沿区域边界\(\partial S\)(闭曲线)的环量等于其区域面积微元旋度之和,即

\[ \oint_{\partial S^{+}} \vec{F} \cdot d\vec{L}=\oint_S \operatorname{rot} \vec{F} \cdot \vec{n}dS \]

二维Green定理:

\[\int_{\partial S^{+}} f_{1} d x+f_{2} d y=\iint_S\left(\frac{\partial f_{2}}{\partial x}-\frac{\partial f_{1}}{\partial y}\right) d x d y \]

三维Stokes定理:

\[ \int_{\partial S^{+}} f_{1}d x+f_{2} d y+f_{3} d z =\iint_{S}\left(\frac{\partial f_{3}}{\partial y}-\frac{\partial f_{2}}{\partial z}\right) d y d z+\left(\frac{\partial f_{1}}{\partial z}-\frac{\partial f_{3}}{\partial x}\right) d z d x+\left(\frac{\partial f_{2}}{\partial x}-\frac{\partial f_{1}}{\partial y}\right) d x d y \]

标签:right,frac,旋度,梯度,定理,散度,vec,partial,left
From: https://www.cnblogs.com/BoyaYan/p/17237493.html

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