Here is a bit on Fortran basics. There will be a continuation of this with functions, subroutines and modules. If there are any mistakes, please do point out. Thanks.
Fortran_verybasics.pdf
Fortran_verybasics.pdf
Thursday, December 25, 2014
Friday, December 12, 2014
Monday, December 8, 2014
12:00 PM
No comments
Hyperbolic, Convection dominated flows -- Lectures by Toro & Chi Wang Shu
This link shows the video of Toro talking about Hyperbolic equations and finite volume and DG frameworks. This lecture is very helpful to get a better understanding and kind of a crash course about solving hyperbolic equations the numerical schemes that can used for specific problems their properties and so on...
If you are interested in higher order methods and more of DG methods, follow the videos by Chi Wang Shu.
This channel on YouTube Link to Channel, will be very helpful to follow on lectures for convection dominated problems and higher order methods.
Have a good time breaking your head and finding the way around these very beautifully built numerical schemes!!! Enjoy!!! :) And we are open for discussions!!!
Wednesday, November 19, 2014
4:42 PM
No comments
Thursday, October 30, 2014
Monday, October 27, 2014
2:00 PM
No comments
Parallel debugging (MPI) - Part 1
Ahem, ahem, searching a needle in a hay stack is easy compared to parallel debugging in MPI, or as a matter parallel debugging. Having overstated the problem in our hands, there are few solutions or workarounds of how to get our hands in the dirty waters and have some fun.
There are two ways (as always) to get our work done, either use free tools or give an arm or leg to buy a fancy debugger.
2. Free debuggers, gdb / valgrind to some extent, Eclipse PTP, etc
(Let us know for any others out there)
Read complete article by the chaps at OpenMPI.
1. gdb
gdb can be used as follows;
mpirun -np <NP> xterm -e gdb ./program |
This the launches xterm windows in which I can do
run <arg1> <arg2> ... <argN> |
Should work the same with ddd (GUI for gdb)
2. valgrind (more at this link)
First of all, you have to make sure that Valgrind 3.2.0 or later is installed, and Open MPI is compiled with Memchecker enabled. Then simply run you application with Valgrind, e.g.:
mpirun -np 2 valgrind ./program |
Sunday, October 26, 2014
6:30 PM
1 comment
Hello all,
I would like to bring in your attention about the power of python, for application in scientific computing. Whilst many people use Fortran,C/C++ for scientific python, a lot of tasks can be automated such as plotting graphs, creating contours calling several external libraries and coupling codes without the need of mixed language programming.
Here's a quick and basic introduction to scipy (Scientific python) which describes the scientific computing based in python:
Click here
Please do comment, suggest, correct and add to our posts
I would like to bring in your attention about the power of python, for application in scientific computing. Whilst many people use Fortran,C/C++ for scientific python, a lot of tasks can be automated such as plotting graphs, creating contours calling several external libraries and coupling codes without the need of mixed language programming.
Here's a quick and basic introduction to scipy (Scientific python) which describes the scientific computing based in python:
Click here
Please do comment, suggest, correct and add to our posts
Friday, October 24, 2014
12:29 PM
No comments
CFD Post-processing in Blender
To generate colourful pictures
Tools needed : paraview and Blender
Tuesday, October 7, 2014
4:53 PM
PetSc Tutorial (C type) - Introduction
After a long struggle (3 days) on getting my hands-on PetSc library, I have compiled few helpful quickies to getting a legacy (or user) code to exploit PetSc functionality. This is not a complete tutorial and I have skipped parts which I do not use !
What is PetSc ?
A numerical algorithms framework with standard linear solvers (and more) for scalable (or super) computers. It is written in C, but can be called fom FORTRAN, C/C++, Python, Java and can run on virtually any OS. It is highly portable but has a steep learning curve (atleast till you get the hang of it).
- It is built on MPI, BLAS, LAPACK.
- And it works on objects like Vec (array) and Mat (Matrices).
- Parallelism & options can be set at runtime. (One code for sequential & parallel)
- Also, has capabilities to work with (MPI + ...) OpenMP, CUDA, etc
- Has interfaces to a huge number of standard libraries.
One good tutorial (out of many) would be http://59a2.org/files/20130618-PRACE.pdf
Saturday, September 20, 2014
3:33 PM
2 comments
Parallelization of UDFs in ANSYS FLUENT
by
Most of the UDFs that we create in-house are programmed for serial mode of ANSYS FLUENT since it only involves basic coding in C program with required marcos and our UDF is ready. However, parallel mode of ANSYS FLUENT has tremendously reduced the simulation time and hence it becomes very important for us to modify our serial UDFs to support parallel processing as well. But, here comes the challenge for us (mechanical engineers) to write down a parallel processing code in C program.
See the full-post here from learnCAx.com SOURCE
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