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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
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<A NAME="PetscDSGetRiemannSolver"><H1>PetscDSGetRiemannSolver</H1></A>
Returns the Riemann solver for the given field
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscds.h"
PetscErrorCode PetscDSGetRiemannSolver(PetscDS prob, PetscInt f,
void (**r)(PetscInt dim, PetscInt Nf, const PetscReal x[], const PetscReal n[], const PetscScalar uL[], const PetscScalar uR[], PetscScalar flux[], void *ctx))
</PRE>
Not collective
<P>
<H3><FONT COLOR="#CC3333">Input Arguments</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>prob </B></TD><TD>- The <A HREF="../DM/PetscDS.html#PetscDS">PetscDS</A> object
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>f </B></TD><TD>- The field number
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Argument</FONT></H3>
<DT><B>r </B> -Riemann solver
<br>
<P>
<H3><FONT COLOR="#CC3333">Calling sequence for r</FONT></H3>
<P>
<pre>
r(<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> dim, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> Nf, const <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> x[], const <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> n[], const <A HREF="../Sys/PetscScalar.html#PetscScalar">PetscScalar</A> uL[], const <A HREF="../Sys/PetscScalar.html#PetscScalar">PetscScalar</A> uR[], <A HREF="../Sys/PetscScalar.html#PetscScalar">PetscScalar</A> flux[], void *ctx)
</pre>
<P>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dim </B></TD><TD>- The spatial dimension
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>Nf </B></TD><TD>- The number of fields
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>x </B></TD><TD>- The coordinates at a point on the interface
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- The normal vector to the interface
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>uL </B></TD><TD>- The state vector to the left of the interface
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>uR </B></TD><TD>- The state vector to the right of the interface
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>flux </B></TD><TD>- output array of flux through the interface
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ctx </B></TD><TD>- optional user context
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/PetscDSSetRiemannSolver.html#PetscDSSetRiemannSolver">PetscDSSetRiemannSolver</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/dm/dt/interface/dtds.c.html#PetscDSGetRiemannSolver">src/dm/dt/interface/dtds.c</A>
<BR><A HREF="./index.html">Index of all DM routines</A>
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