Transcription of Boundary Conditions - University of Southampton
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Boundary Conditions - University of Southampton
2006 ANSYS, Inc. All rights , Inc. ProprietaryBoundary ConditionsBoundary ConditionsIntroductory FLUENT TrainingIntroductory FLUENT Training4-2 2006 ANSYS, Inc. All rights , Inc. ProprietaryFluent User Services December 2006 Defining Boundary Conditions To define a problem that results in a uniquesolution, you must specify information on the dependent (flow) variables at the domain boundarieszSpecify fluxes of mass, momentum, energy, etc. into the domain. Defining Boundary Conditions involves:zIdentifying the location of the boundaries ( , inlets, walls, symmetry)zSupplying information at the boundaries The data required at a Boundary depends upon the Boundary condition type and the physical models employed. You must be aware of the information that is required of the Boundary condition and locate the boundaries where the information on the flow variables are known or can be reasonably approximatedzPoorly defined Boundary Conditions can have a significant impact on your solution4-3 2006 ANSYS, Inc.
Gauge Total Pressure zDefines energy to drive flow. zDoubles as back pressure (static gauge) for cases where backflow occurs. ... Wall roughness can be defined for turbulent flows. zWall shear stress and heat transfer based on local flow field.
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