Finite Element Fortran Program Statement

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Finite Element Fortran Program Statement

They include D.C. Finite element electrical programs in 2-D and 3-D (ELECFEM2D.F, ELECFEM3D.F), finite element elastic programs in 2-D and 3-D (ELAS2D.F, ELAS3D.F), finite element elastic programs that incorporate thermal strains (eigenstrains) in 2-D and 3-D (THERMAL2D.F, THERMAL3D.F), and nite dierence electrical programs for a.c. Chapter 2 - Basic Elements of FORTRAN. 2.3 Structure of a FORTRAN Statement. A program consists of a series of statements designed to accomplish the goal of the task. The strict Fortran77 standard requires the use of upper-case letters only in program statements, except in comment statements or when writing strings of text to be used in printed output. In fact in Fortran, multi-dimensional arrays are stored in such a way that the first subscript changes most rapidly e.g. The elements of. Source Codes in Fortran90. Read and write files used by the FreeFem++ finite element program to store mesh. Specified in the FORTRAN language.

Hello; If someone has experience in writing Finite elements in Fortran, could comment on this statement I saw in this paper? Www.math.mcmaster.ca/~bprotas/MATH745b/matlab_fem.pdf in section 2: 'A simple two dimensional finite element program in Matlab need only be a few hundred lines of code whereas in Fortran or C++ one might need a few thousand.' This was in written in 2002. So Fortran 95 with its vectored arrays and matrices was around by then.

Since I do not have experience in writing finite elements in Fortran, I wanted to ask why would the above be the case? I can see the above to be the case when using F77 for sure due to the longer looping constructs needed among other things, but with modern Fortran, I would think the size of the 2D fem between Matlab and Fortran should not be that much different? What else in FEM programming can cause one to write few thousands lines of Fortran for the same functionality as Matlab's few hundreds lines program?

Ofcourse, I am not talking about plotting here, just the computational part as Fortran does not have plotting build-in like Matlab. Ni Maschine Serial Number Keygen Mac Download there. I can't think right now what can make this huge difference, but again, I have little experience in Fortran and in FEM, but starting to learn it. Thanks, --Nasser. On 3/4/2012 1:32 AM, Nasser M.

Abbasi wrote: >Hello; >>If someone has experience in writing Finite elements in Fortran, >could comment on this statement I saw in this paper? >>www.math.mcmaster.ca/~bprotas/MATH745b/matlab_fem.pdf >>in section 2: >>'A simple two dimensional finite element program in >Matlab need only be a few hundred lines of code whereas >in Fortran or C++ one might need a few thousand.' >>This was in written in 2002. So Fortran 95 with its >vectored arrays and matrices was around by then.

>Very interesting, I just saw a similar quote in a textbook published in 2000 The Finite Element Method Using MATLAB, Second Edition 'For example, one page of MATLAB code may be equivalent to many pages of other computer language source code' I can see the above to be true for many languages, due to Matlab vectored operations and many matrix short cut notations, but I still do not see why for the modern Fortran language, as I think modern Fortran has many of these now. I can see the Fortran code to be little longer for variables declarations, since in Matlab one does not need to declare variables. But this will may be add 5% to the code? Codejock Software Tutorial here. Not 10 times as long. The only way to find out, is for me to write a 2D solver using FEM for say Poisson PDE in modern Fortran and Matlab and compare side by side to see what would cause this large difference in program length. Abbasi wrote: >If someone has experience in writing Finite elements in Fortran, >could comment on this statement I saw in this paper?

>www.math.mcmaster.ca/~bprotas/MATH745b/matlab_fem.pdf >in section 2: >'A simple two dimensional ^Lfinite element program in >Matlab need only be a few hundred lines of code whereas >in Fortran or C++ one might need a few thousand.' >This was in written in 2002. So Fortran 95 with its >vectored arrays and matrices was around by then. >Since I do not have experience in writing finite elements >in Fortran, I wanted to ask why would the above be the case? Sounds about right to me.

First, how big is the matlab program itself? Is it fair to count that as part of the matlab version? Yes you have array expressions, but they often don't help that much, and in many cases will be slower than the DO case. Just an example, you might want an LU decomposition solver, usually recommended over matrix inversion for solving linear systems, but that is so far not a Fortran intrinsic. Also, I/O is a big part of many such programs, where the matlab version uses standard matlab I/O. The Fortran version might have more options and allow for more different input and output formats.