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MASS_FLOW.html
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<html><head><link rel="stylesheet" type="text/css" href="style.css"/></head><body> <H2> <BR> *MASS FLOW </H2> <P> Keyword type: step <P> This option allows the specification of a mass flow through a face in 3-D Navier-Stokes calculations. <P> In order to specify which face the flow is entering or leaving the faces are numbered. The numbering depends on the element type. <P> For hexahedral elements the faces are numbered as follows (numbers are node numbers): <UL> <LI>Face 1: 1-2-3-4 </LI> <LI>Face 2: 5-8-7-6 </LI> <LI>Face 3: 1-5-6-2 </LI> <LI>Face 4: 2-6-7-3 </LI> <LI>Face 5: 3-7-8-4 </LI> <LI>Face 6: 4-8-5-1 </LI> </UL> <P> for tetrahedral elements: <UL> <LI>Face 1: 1-2-3 </LI> <LI>Face 2: 1-4-2 </LI> <LI>Face 3: 2-4-3 </LI> <LI>Face 4: 3-4-1 </LI> </UL> <P> for wedge elements: <UL> <LI>Face 1: 1-2-3 </LI> <LI>Face 2: 4-5-6 </LI> <LI>Face 3: 1-2-5-4 </LI> <LI>Face 4: 2-3-6-5 </LI> <LI>Face 5: 3-1-4-6 </LI> </UL> <P> The mass flow is entered as a uniform flow with flow type label Mx where x is the number of the face. Right now, only zero mass flow is allowed, i.e. no flow is entering or leaving the domain. There are no parameters for this keyword card. <P> In order to apply a mass flow to a surface the element set label underneath may be replaced by a surface name. In that case the mass flow type label takes the value “M” without any number following. <P><P> <BR> <P> First line: <UL> <LI>*MASS FLOW </LI> </UL> <P> Following line: <UL> <LI>Element number or element set label. </LI> <LI>Mass flow type label. </LI> <LI>Zero. </LI> </UL> Repeat this line if needed. <P> <PRE>
Example:
*MASS FLOW
20,M2
</PRE> <P> assigns a zero mass flow to face 2 of element 20. <P> <P><P> <BR> Example files: bumpsubfine (large fluid examples). <P> </body></html>