﻿ Solid Wall Boundary
Manufacturing Solutions

# Solid Wall Boundary

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.

### 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)