17-3 - Math 200, Spring 2010 Handout #30 Section 17-3...

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Math 200, Spring 2010 Handout #30 Section 17-3 Divergence Theorem The Divergence Theorem (Gauss’s Theorem) Suppose W is a simple solid region and S is the boundary surface of W , given with positive (outward) orientation. If F is a vector field whose components have continuous partial derivatives on an open region containing W , then ( ) div S W d dV = ∫∫ ∫∫∫ F S F i . This says that, under the given conditions, the flux of F across the boundary surface of W is equal to the triple integral of the divergence of F over W . The Divergence Theorem applies to simple solid regions or regions that are a finite union of simple solid regions. Examples of simple solid regions are regions bounded by ellipsoids or rectangular boxes. Note: If F is a velocity field of a fluid in motion, then the total flux of the velocity field across the boundary is equal to the triple integral of the divergence of the velocity field over the solid. The positively oriented boundary surface of the solid region W often written as W , and ( ) div F as F i , so the Divergence Theorem can be expressed as W W dV d = ∫∫∫ ∫∫ F F S i i Observe the similarity to Green’s and Stokes’ Theorems:
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This note was uploaded on 02/24/2011 for the course MATH 200 taught by Professor Jamesdcampbell during the Spring '10 term at Santa Barbara City.

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17-3 - Math 200, Spring 2010 Handout #30 Section 17-3...

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