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| Time control
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startFrom |
Controls the start time of the simulation. |
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- firstTime |
Earliest time step from the set of time directories. |
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- startTime |
Time specified by the startTime keyword entry. |
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- latestTime |
Most recent time step from the set of time directories. |
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startTime |
Start time for the simulation with startFrom startTime; |
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stopAt |
Controls the end time of the simulation. |
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- endTime |
Time specified by the endTime keyword entry. |
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- writeNow |
Stops simulation on completion of current time step and writes
data. |
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- noWriteNow |
Stops simulation on completion of current time step and does not
write out data. |
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- nextWrite |
Stops simulation on completion of next scheduled write time,
specified by writeControl. |
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endTime |
End time for the simulation when stopAt endTime; is specified. |
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deltaT |
Time step of the simulation. |
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| Time step control
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adjustTimeStep |
yes/no† to adjust time step according to maximum Courant
number in transient simulation. |
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maxCo |
Maximum Courant number allowed. |
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maxDeltaT |
Maximum time step allowed in transient simulation. |
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| Data writing
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writeControl |
Controls the timing of write output to file. |
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- timeStep† |
Writes data every writeInterval time steps. |
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- runTime |
Writes data every writeInterval seconds of simulated time. |
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- adjustableRunTime |
Writes data every writeInterval seconds of simulated
time, adjusting the time steps to coincide with the writeInterval
if necessary — used in cases with automatic time step adjustment. |
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- cpuTime |
Writes data every writeInterval seconds of CPU time. |
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- clockTime |
Writes data out every writeInterval seconds of real time. |
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writeInterval |
Scalar used in conjunction with writeControl described above. |
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purgeWrite |
Integer representing a limit on the number of time directories that
are stored by overwriting time directories on a cyclic basis. Example
of  ,  and purgeWrite 2;: data written into 2
directories, 6 and 7, before returning to write the data at 8  in
6, data at 9 into 7, etc. |
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To disable the time directory limit, specify purgeWrite 0;† |
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For steady-state solutions, results from previous iterations can be
continuously overwritten by specifying purgeWrite 1; |
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writeFormat |
Specifies the format of the data files. |
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- ascii† |
ASCII format, written to writePrecision significant figures. |
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- binary |
Binary format. |
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writePrecision |
Integer used in conjunction with writeFormat described above,
6† by default |
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writeCompression |
Specifies the compression of the data files. |
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- uncompressed |
No compression.† |
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- compressed |
gzip compression. |
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timeFormat |
Choice of format of the naming of the time directories. |
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- fixed |
 where the number of  s is set by timePrecision.
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- scientific |
 where the number of s is set by
timePrecision.
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- general† |
Specifies scientific format if the exponent is less than -4 or
greater than or equal to that specified by timePrecision. |
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timePrecision |
Integer used in conjunction with timeFormat described above,
6† by default |
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graphFormat |
Format for graph data written by an application. |
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- raw† |
Raw ASCII format in columns. |
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- gnuplot |
Data in gnuplot format. |
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- xmgr |
Data in Grace/xmgr format. |
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- jplot |
Data in jPlot format. |
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| Data reading
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runTimeModifiable |
yes†/no switch for whether dictionaries, e.g.controlDict, are
re-read by OpenFOAM at the beginning of each time step. |
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| Run-time loadable functionality
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libs |
List of additional libraries (on $LD_LIBRARY_PATH) to be loaded
at run-time, e.g.( "libUser1.so" "libUser2.so" ) |
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functions |
List of functions, e.g. probes to be loaded at run-time; see
examples in $FOAM_TUTORIALS |
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| † denotes default entry if associated keyword is omitted.
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Table 6.1: Keyword entries in the controlDict dictionary. |
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