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Solid Wall Boundary |
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Solid Wall Boundary |
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»Click here to display Table of Contents«
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Solid Wall Boundary |
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Solid Wall Boundary |
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BC_Type = SolidWall: This boundary type is used to impose conditions at the solid walls. The syntax for this boundary condition is:
SolidWall wall { ( X_Velocity = Ux, Y_Velocity = Uy, Z_Velocity = Uz, |
FrictionModel = "string",
FrictionCoeff = C,
SlipVelocity_X = U_wx, SlipVelocity_Y = U_wy, SlipVelocity_Z = U_wz,
SlipVelExponent = m),
( Temperature Twall | HeatFlux = qwall | ConvCoeff = hc, ConvTref = Tinf ) }
Here wall is the name of the solid wall boundary and is specified by you. For the momentum equation, specify either velocity or slip condition (friction) at the wall. When specifying friction boundary condition, you must specify the slip vector. The friction at the tool-workpiece interface is computed using the specified friction model. The name of this model must be specified inside double quotes. Refer to the section on friction model to learn more about the supported friction models.
For the energy equation, you can specify temperature or heat flux or surface convection type boundary conditions. Here again, the data can be expressed either as constant or function of space and time. Valid data types for each field are given in the table below.
Valid data types for SolidWall boundary conditions.
Variable Name |
Description |
Valid Data Types |
Velocity (Ui) |
Velocity component (i=x,y,z) |
CONSTANT, EXPRESSION f(x,y,z,t) |
FrictionModel |
Friction model |
{SlipVelocity | Coulomb | Viscoplastic } |
FrictionCoeff |
Friction coefficient |
CONSTANT, EXPRESSION f(x,y,z,t) |
SlipVelocity_i |
Velocity vector of the boundary in the slip direction |
CONSTANT, EXPRESSION f(x,y,z,t) |
SlipVelExponent |
Exponent of slip velocity |
CONSTANT (only for PowerLaw model) |
Temperature (T) |
Static temperature |
CONSTANT, EXPRESSION f(x,y,z,t) |
HeatFlux (q) |
Magnitude of surface heat flux |
CONSTANT, EXPRESSION f(x,y,z,t) |
ConvCoeff |
Convective heat transfer coefficient |
CONSTANT, EXPRESSION f(x,y,z,t) |
ConvTref |
Outside temperature |
CONSTANT, EXPRESSION f(x,y,z,t) |