[eruptionjoojo]

Hello everyone,

I'm wanting to make a grid as is indicated in the image attached, the problem is that i really don't have any idea how to do it ......... which compiler is needed etc. thus wanted others help in this regard ............

thnks in advance

[DoHander]

If you really want to generate this in Fortran you can use the gfortran compiler which is free and works perfectly on Windows, Linux and Mac.

A possible implementation will be:

dx=0.5
dy=0.05

do i=1,Nr_points_X
x(i)=i*dx;
enddo

do i=1,Nr_points_Y
y(i)=i*dy;
enddo
.........

However for such a toy grid you can basically use any language. If I remember correctly Matlab has a function that can generate this kind of grids for you (maybe ndgrid ...).

Do

[eruptionjoojo]

Originally Posted by DoHander

If you really want to generate this in Fortran you can use the gfortran compiler which is free and works perfectly on Windows, Linux and Mac.

A possible implementation will be:

dx=0.5
dy=0.05

do i=1,Nr_points_X
x(i)=i*dx;
enddo

do i=1,Nr_points_Y
y(i)=i*dy;
enddo
.........

However for such a toy grid you can basically use any language. If I remember correctly Matlab has a function that can generate this kind of grids for you (maybe ndgrid ...).

Do

thnks a lot for your response ...............

but while i copy pasted the code you provided i get errors,which are as listed below ........... i'm really a newbie and don't know anything about fortran programming from declaring the variables,etc.,so kindly help me, by providing the exact code as to be pasted in the .f90 file.the errors which i get are as listed below:-




C:\Documents and Settings\ISM\Desktop\Fortran>gfortran test.f90 -o code.exe
test.f90:7.10:

x(i)=i*dx;
1
Error: Unexpected STATEMENT FUNCTION statement at (1)
test.f90:11.10:

y(i)=i*dy;
1
Error: Unexpected STATEMENT FUNCTION statement at (1)
Error: Unexpected end of file in 'test.f90'




and yeah as you stated this could also be done in matlan infact i have already generated the grid in matlab using meshgrid as well as by using a simple loop program ........
but for some reasons i wanted to make the grid in fortran b'coz i need to further work on this grid and form various profiles like velocity profile,etc. and then apply N-S equation at all the nodal points to get the desired output ....

[DoHander]

What I've given you wasn't a complete program it was just a piece of code, a small example. You need to declare x and y as vectors if you want the code to run, also you need to add an "end" to the code.

I don't have a Fortran code for generating this mesh, this was just a suggestion for you of how you can implement this.

I recommend you to read a Fortran 77 or 90 tutorial.

(Based on your initial message I was under the impression you know a bit of Fortran or at least you plan to learn something. If you plan to implement a NS solver in Fortran you need to learn how to program in Fortran.)

Do