Week 8 - Simulation of a backward facing step in OpenFOAM
foam file
format ascii;
class dictionary;
object block mesh dict;
convert to meters 0.01;
vertices
(
(0 0 0)
(8 0 0)
(8 0.5 0)
(0 0.5 0)
(8 1 0)
(0 1 0)
(20 1 0)
(20 0.5 0)
(20 0 0)
(20-1 0)
(8 -1 0)
(0 0 0.1)
(8 0 0.1)
(8 0.5 0.1)
(0 0.5 0.1)
(8 1 0.1)
(0 1 0.1)
(20 1 0.1)
(20 0.5 0.1)
(20 0 0.1)
(20 -1 0.1)
(8 -1 0.1)
);
Blocks
(
hex (0 1 2 311 12 13 14) (80 5 1)simple Grading (1 1 1)
hex (3 2 4 514 13 15 16)( 80 5 1) simple Grading (1 1 1)
hex (2 7 6 413 18 17 15)(120 5 1)simple grading (1 1 1)
hex (1 8 7 2 12 19 18 13)(120 5 1)simple grading (1 1 1)
hex (10 9 8 121 20 19 12)(120 10 1) simple Grading (1 1 1)
);
edges
(
);
boundary
(
inelt
{
Type of patch;
faces
(
(0 11 14 3)
(3 14 16 5)
);
}
Outlet
{
type of patch;
faces
(
(9 8 19 20)
(8 7 18 19)
(7 6 17 18)
);
}
front and back;
{
type empty;
faces
(
(11 12 13 14)
(14 13 15 16)
(13 18 17 15)
(12 19 18 13)
(21 20 19 12)
(0 3 2 1)
(3 5 4 2)
(2 4 6 7)
(1 2 7 8)
(10 1 8 9)
);
}
fixed walls
{
Type wall;
Faces
(
( 5 16 15 4)
(0 1 12 11)
(4 15 17 6)
(10 9 20 21)
(10 20 21 1)
);
}
);
Merge path pairs
(
);
//*******************************************************//
Foam file
{
format ascii;
class dictionary;
object block mesh dict;
}
//******************************************//
convert to meters 0.01;
vertices
(
(0 0 0)
(8 0 0)
(8 0.5 0)
(0 0.5 0)
(8 1 0)
(0 1 0)
(20 1 0)
(2 0 0.5 0)
(20 0 0)
(20-1 0)
(8 -1 0)
(0 0 0.1)
(8 0 0.1)
(8 0.5 0.1)
(0 0.5 0.1)
(8 1 0.1)
(0 1 0.1)
(20 1 0.1)
(20 0.5 0.1)
(20 0 0.1)
(20 -1 0.1)
(8 -1 0.1)
);
Blocks
(
hex (0 1 2 311 12 13 14) (80 5 1)simple Grading (0.2 5 1)
hex (3 2 4 514 13 15 16)( 80 5 1) simple Grading (0.2 0.2 1)
hex (2 7 6 413 18 17 15)(120 5 1)simple grading (5 0.2 1)
hex (1 8 7 2 12 19 18 13)(120 5 1)simple grading (5 5 1)
hex (10 9 8 121 20 19 12)(120 10 1) simple Grading (5 5 1)
);
edges
(
);
boundary
(
inelt
{
Type of patch;
faces
(
(0 11 14 3)
(3 14 16 5)
);
}
Outlet
{
type of patch;
faces
(
(9 8 19 20)
(8 7 18 19)
(7 6 17 18)
);
}
front and back;
{
type empty;
faces
(
(11 12 13 14)
(14 13 15 16)
(13 18 17 15)
(12 19 18 13)
(21 20 19 12)
(0 3 2 1)
(3 5 4 2)
(2 4 6 7)
(1 2 7 8)
(10 1 8 9)
);
}
fixed walls
{
Type wall;
Faces
(
( 5 16 15 4)
(0 1 12 11)
(4 15 17 6)
(10 9 20 21)
(10 20 21 1)
);
}
);
Merge path pairs
(
);
//*********************************************************//
foam file
{
format ascii;
class dictionary;
location “system”;
object control dict;
}
application icofoam;
start foam start time;
startTime 0;
stopat end time;
end Time 0.2;
delta 0.001;
write Control time Step;
write interval 20;
purge Write 0;
write Format ascii;
write Precision 6;
write compression off;
time Format general;
time precision 6;
run time modifiable true;
//*************************************************************//
foam file
{
format ascii;
class volscalar field;
object p;
}
//****************************************************//
dimensions [0 2 -2 0 0 0 0]
internal field uniform 0;
boundary field
{
Inlet
{
Type zero gradient;
}
Outlet
{
type fixed value;
Value uniform 0;
}
Fixed walls;
{
type zero gradient;
}
Front and back
{
type empty;
}
}
//****************************************//
foam file
{
format ascii;
Class volvectorfield;
Object u;
}
//******************************//
Dimensions [ 0 1 -1 0 0 0 0];
Internal field uniform (0 0 0);
Boundary field;
{
Inlet
{
type fixed value;
Value uniform (10 0 0);
}
Outlet
{
type zero gradient;
}
fixed walls
{
Type noslip;
}
front and back
{
type empty;
}
}
//**********************************//