In its endeavor to push the frontiers of technology ZN created a grid of 4.25 Billion for simulation of RADAR Cross Section of a generic missile. The 96 GB grid file was created after innovation in fields like storage of files, improvement in data structure to write files in a special manner and effective parallelization. The file is CGNS compatible for better interoperability.
The grid is a multi-block structured grid and will be used on PARAM Yuva the latest high performance computing facility inaugurated by CDAC. The grid contains 53 link files each having 80 million cells approximately. The grid contains 1364 blocks and 8184 faces. Prof G R Shevare who guided the project team in making the grid said “It was a challenge to write such a huge file as the file systems permit much smaller files to be written on the memory disk. We devised a method to circumvent this problem that would enable us to write even bigger files in future. But the file size was not the only problem, as the file has to be of a good quality that would give a much better result than the one billion mesh simulated earlier and hence special care was taken to decide on the topology and grid smoothening and quality.”
Prof Banerjee while congratulating the project team exclaimed “It is yet another example of innovation and creativity that propels ZN forward.” ZN has already got an application to test its results vis-� -vis experimental results from a national laboratory.
ZN would like to thank CDAC for its generous help in not only providing the computing facility but also for helping in setting up the simulation in this state of the art facility. The one billion grid simulation required 2048 CPUs for four hours to get the converged result. The use of so many CPUs at a time has established the efficient parallelization and scalability of ZNs software. ZN engineers with the help of CDAC scientists are setting up 4.25 billion mesh simulation and would require a much large computing power and we hope to harness the full capabilities of PARAM Yuva for projects of national and industrial importance.
Project team comprised of Mihir Chawda, Abhay Chougule, Manoj Vaghela.
