Commit ff8b3723 authored by Andrea Cassinelli's avatar Andrea Cassinelli

Minor adjustments to IncNS user guide

parent eeeb3814
Pipeline #1114 skipped with stage
......@@ -300,7 +300,7 @@ of the form
\subsubsection{Substepping/subcycling the Velocity Correction Scheme}
It is possible to use difference time steps in the velocity correction
It is possible to use different time steps in the velocity correction
scheme using a substepping (also known as subcycling) \cite{Sh03} or
auxiliary semi-Lagrangian approach \cite{XiShDoKa}. Originally the
scheme was proposed by Maday, Patera and Ronquist who referred to as
......@@ -332,12 +332,12 @@ explicit part is advanced using a DG scheme it is necessary to use a
\inltt{Mixed\_CG\_Discontinuous} expansion with this option.
\begin{notebox}
Example of the substepping scheme can be found in the regression tests
Some examples of the substepping scheme can be found in the regression tests
directory under
\texttt{\${NEKHOME}/Solver/IncNavierStokesSolver/Tests/} directory. For
exmaple the test cases \texttt{KovaFlow\_SubStep\_2order.xml},
\texttt{\${NEKHOME}/Solver/IncNavierStokesSolver/Tests/} directory:
\texttt{KovaFlow\_SubStep\_2order.xml},
\texttt{Hex\_Kovasnay\_SubStep.xml} and
\texttt{Tet\_Kovasnay\_SubStep.xml}
\texttt{Tet\_Kovasnay\_SubStep.xml}.
\end{notebox}
\subsubsection{Approximation spaces for the velocity correction scheme}
......@@ -345,7 +345,7 @@ exmaple the test cases \texttt{KovaFlow\_SubStep\_2order.xml},
For well resolved simulations it appears that often using the same
polynomial space for the pressure and velocity does give suitable
answer but this does not satisfy the so-called LBB or inf-sup
condition. Therefore it is potentially better to specify an equivalent
condition. Therefore, it is potentially better to specify an equivalent
of the Taylor Hood approximation and use one higher polynomial order
for velocity than the pressure with a continuous expansion. To specify
this type of expansion you can use an expansion section of the form:
......@@ -767,7 +767,7 @@ BDF Order 2 & \texttt{BDFImplicitOrder2} & all & US, UNS & CG-DG \\
\end{center}
\item \inltt{Extrapolation}: Specify the extrapolation method
(standard or substetping) to be used in velocity correction
(standard or substepping) to be used in velocity correction
scheme. Essentially this activates the sub-stepping routine which
requires the mixed CG-DG projection
......@@ -1066,13 +1066,13 @@ To enable the filter, add the following to the \inltt{FORCE} tag::
\begin{lstlisting}[style=XMLStyle]
<FORCE TYPE="MovingBody">
<PARAM NAME="OutputFile">DragLift.frc</PARAM>
<PARAM NAME="OutputFile">DragLift</PARAM>
<PARAM NAME="OutputFrequency">10</PARAM>
<PARAM NAME="Boundary"> B[0] </PARAM>
</FORCE>
\end{lstlisting}
During the execution a file named \inltt{DragLift.frc} will be created and the
During the execution a file named \inltt{DragLift.fce} will be created and the
value of the aerodynamic forces on boundary 0, defined in the
\inltt{GEOMETRY} section, will be output every 10 time steps.evaluates the aerodynamic forces along the moving body surface. The
forces for each computational plane are projected along the Cartesian axes and the pressure and viscous contributions are computed in each direction.
......
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