/MAT/LAW46 (LES_FLUID)
Block Format Keyword Describes the viscous fluid material with sub-grid scale viscosity.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/MAT/LAW46/mat_ID/unit_ID or /MAT/LES_FLUID/mat_ID/unit_ID | |||||||||
mat_title | |||||||||
c | |||||||||
Isgs | Cs | Csp |
Definitions
Field | Contents | SI Unit Example |
---|---|---|
mat_ID | Material identifier. (Integer, maximum 10 digits) |
|
mat_title | Material
title. (Character, maximum 100 characters) |
|
unit_ID | Unit Identifier. (Interger, maximum 10 digits) |
|
Initial
density. (Real) |
||
Reference density
used in E.O.S (equation of state). Default (Real) |
||
c | Speed of
sound. (Real) |
|
Molecular kinematic
viscosity. (Real) |
||
Isgs | Sub-grid scale model.
(Integer) |
|
Cs | Smagorinsky
constant. Default = 0.1 (Real) |
|
Csp | Pressure damping
coefficient. Default = Cs (Real) |
Example
#RADIOSS STARTER
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/MAT/LAW46/5
FLUID (unit: kg_m_s)
# RHO_I
1562.5
# c NU
593.3 2.4e-6
# Isgs C_s Csp
2 0 0
/EULER/MAT/5
# Modif. factor.
0
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#ENDDATA
/END
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
Comments
- For Isgs = 1 or 2, .
- For Isgs = 3, is the smallest dimension of each element.
-
is computed as:
(1) - This law is modified
near wall boundaries:
if
, otherwise.
Where,- Sub grid scale viscosity
- von Kahrman constant