Hello,
I am a new user of Nektar++ and will be using the Linear Stability Analysis solver. I have been able to run simulations successfully and I have a few basic questions related to post-processing in Nektar++. I would be grateful if someone could help me with the following questions:

1. What are the headers of the ConvergenceHistory.txt file ? There are 5 columns where I understand the first three are iteration number, simulation time, computation time. Are the other two Linf and L2 ?

2. I had run the solver in parallel which generates folders with n chk/fld files for n processes. Is there any way I can combine these n files into a single vtu file for post-processing ?

I couldn't find answers to the above questions in user-guide as well as in the email archive. Hence, I am posting this email.