udfGetEbcContvar()
Return the surface contravariant at the surface quadrature point.
Syntax
contvar = udfGetEbcContvar( udfHd ) ;
Type
AcuSolve User-Defined Example Boundary Condition
Parameters
- udfHd
- The opaque handle (pointer) which was passed to the user function.
Return Value
- contvar (Real*)
- Pointer to two dimensional real array of the contravariant. The first (fastest) dimension of the array is the number of surfaces, nItems, and the second (slower) dimension is six, for the xx, yy, zz, xy, yz and zx components.
Description
This routine returns the surface contravariant at the surface quadrature point. The surface
contravariant is given by(1)
where 
is the local
parent element coordinate (with 
being normal to
the surface) and 
is the global coordinate. The latter is for the current (deformed) configuration if
mesh displacement is active. For
example,
is the local
parent element coordinate (with being normal to
the surface) and is the global coordinate. The latter is for the current (deformed) configuration if
mesh displacement is active. For
example,Real* contvar ;
Real xx_contvar, yy_contvar, zz_contvar ;
Real xy_contvar, yz_contvar, zx_contvar ;
Integer surf ;
...
contvar = udfGetEbcContvar( udfHd ) ;
for ( surf = 0 ; surf < nItems ; surf++ ) {
xx_contvar = contvar[0*nItems+surf] ;
yy_contvar = contvar[1*nItems+surf] ;
zz_contvar = contvar[2*nItems+surf] ;
xy_contvar = contvar[3*nItems+surf] ;
yz_contvar = contvar[4*nItems+surf] ;
zx_contvar = contvar[5*nItems+surf] ;
...
}Errors
- This routine expects a valid udfHd.
- This routine may only be called within an Element Boundary Condition user function.