Usage:./main < inputfile >< prefix > It outputs intermediate solutions every 10 iterations and returns total iteration numberwhen the CGSolver converges.

Usage: python3 postprocess.py< inputfile >< solutionfile > It outputs the mean temperature and plots a pseudocolor plot of the temperaturedistribution inside the pipe wall with the mean temperature isoline.

Usage: python3 animation.py< inputfile >< prefix > It repeatedly plot all the solution files of a specific input file with an interval of 0.3s asthe animation. And the repeat delay is 1.0s.