Index

Global force imposed along boundary i

Ver: 1
 

DESCRIPTION

For flow problems, selecting this type of boundary condition allows the user to specify a fixed force, instead of a force density.
Such a boundary condition is useful at moving boundaries. A typical example is the fiber spinning process : a fiber, the cross-
sectional area of which is unknown, is pulled down with a given force.   OPTIONS
 
-1
 Upper level menu
1
 Modification of fx
2
 Modification of fy
3
 Modification of fz
Available only for 3-D flows
NOTES Fiber spinning flow process may involve high non-linearities.
The use of an evolution scheme applied on the global force may be recommended.

The user should be aware of the system of units, if dimensional values are used.
The units for fx, fy and fz are :
  Parameter 
Mass
Length
Time
Temperature
 fx-y-z (3D)
1
1
-2
-
 fx-y (2D planar)
1
-
-2
-
 fx-y (2D axi.)
1
1
-2
-

SEE ALSO