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22.4.4 Separation Criteria

The film can separate from the wall when the stress at an edge of the film exceeds the adhesion forces holding the film to the wall. These forces are complex and highly dependent on local surface conditions. An order of magnitude analysis of a film rounding a sharp corner shows that the stresses at the edge of a film are proportional to the angle which the film negotiates. In FLUENT, you can specify the maximum angle that the film can negotiate using a special text command. For more information, contact your FLUENT support engineer.

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Up: 22.4 Wall-Film Model Theory
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© Fluent Inc. 2006-09-20