[redbullah]

When one runs a serial simulation he only gets temporal directories. But parallel run generates processor directories and reconstructs them into individual temporal directories.

My question is; say, after running a single processor simulation up to t=100 (or if I delete processor directories after a parallel run followed by a reconstruction and only temporal directories are left), is it possible to deconstruct those temporal directories into processors to continue from t=100 with a parallel run?

[Taataa]

A clean approach would be to create a copy of the case with addition of a decomeParDict and mapFieldsDict files. Then use the mapFields utility to map the fields as initial condition for the original case. Here's how I usually do this:

latest=$(foamListTimes -latestTime -case relative/path/to/original/case)
mapFields -sourceTime $latest -consistent relative/path/to/original/case

[jherb]

Have you tried running decomposePar after the serial run in the same case directory? (perhaps you need to use the option -latestTimestep or -lastestTime). This should create the processor directories with the 100 s timestep split up.