/ALE/LINK/VEL

Block Format Keyword With ALE links on grid velocities, given nodes are linked to the given main grid velocities. Either a direction or a combination of directions can be specified.


ale_link_vel
Figure 1.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/ALE/LINK/VEL/alelink_ID
alelink_title
node_ID1 node_ID2 grnod_ID grid_dof Iform          
Tstart Tstop            

Definitions

Field Contents SI Unit Example
node_ID1 First main node number.

(Integer, maximum 10 digits)

  
node_ID2 Second main node number.

(Integer, maximum 10 digits)

  
grnod_ID Node group to which ALE link is applied.

(Integer, maximum 10 digits)

  
grid_dof A combination of X, Y, and Z.
=0
Free DOF
=1
Fixed DOF

(Booleans)

(see Codes for Grid Velocity Directions: grid_dof)

  
Iform Formulation flag.
= 0 (linear)
W N = W M 1 + ( W M 2 − W M 1 ) 1 N + 1 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaC4vamaaBa aaleaacaWGobaabeaakiabg2da9iaahEfadaWgaaWcbaGaamytaiaa igdaaeqaaOGaey4kaSYaaeWaaeaacaWHxbWaaSbaaSqaaiaad2eaca aIYaaabeaakiabgkHiTiaahEfadaWgaaWcbaGaamytaiaaigdaaeqa aaGccaGLOaGaayzkaaWaaSaaaeaacaaIXaaabaGaamOtaiabgUcaRi aaigdaaaaaaa@4763@
= 1 (maximum)
W N = W M 1 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaC4vamaaBa aaleaacaWGobaabeaakiabg2da9iaahEfadaWgaaWcbaGaamytaiaa igdaaeqaaaaa@3B7F@ if | W M 1 | > | W M 2 | MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca WHxbWaaSbaaSqaaiaad2eacaaIXaaabeaaaOGaay5bSlaawIa7aiab g6da+maaemaabaGaaC4vamaaBaaaleaacaWGnbGaaGOmaaqabaaaki aawEa7caGLiWoaaaa@428A@
W N = W M 2 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaC4vamaaBa aaleaacaWGobaabeaakiabg2da9iaahEfadaWgaaWcbaGaamytaiaa ikdaaeqaaaaa@3B80@ if | W M 1 | < | W M 2 | MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca WHxbWaaSbaaSqaaiaad2eacaaIXaaabeaaaOGaay5bSlaawIa7aiab gYda8maaemaabaGaaC4vamaaBaaaleaacaWGnbGaaGOmaaqabaaaki aawEa7caGLiWoaaaa@4286@
= -1 (minimum)
W N = W M 1 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaC4vamaaBa aaleaacaWGobaabeaakiabg2da9iaahEfadaWgaaWcbaGaamytaiaa igdaaeqaaaaa@3B7F@ if | W M 1 | < | W M 2 | MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca WHxbWaaSbaaSqaaiaad2eacaaIXaaabeaaaOGaay5bSlaawIa7aiab gYda8maaemaabaGaaC4vamaaBaaaleaacaWGnbGaaGOmaaqabaaaki aawEa7caGLiWoaaaa@4286@
W N = W M 2 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaC4vamaaBa aaleaacaWGobaabeaakiabg2da9iaahEfadaWgaaWcbaGaamytaiaa igdaaeqaaaaa@3B7F@ if | W M 1 | > | W M 2 | MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaqWaaeaaca WHxbWaaSbaaSqaaiaad2eacaaIXaaabeaaaOGaay5bSlaawIa7aiab g6da+maaemaabaGaaC4vamaaBaaaleaacaWGnbGaaGOmaaqabaaaki aawEa7caGLiWoaaaa@428A@

(Integer)

  
Tstart Start time.

(Real)

  
Tstop Stop time.

(Real)

  

Codes for Grid Velocity Directions: grid_dof

(1)-1 (1)-2 (1)-3 (1)-4 (1)-5 (1)-6 (1)-7 (1)-8 (1)-9 (1)-10
      WX WY WZ        

Definitions

Field Contents SI Unit Example
WX Code for grid velocity in direction X.
= 0
Free DOF
= 1
Fixed DOF

(Boolean)

  
WY Code for grid velocity in direction Y.
= 0
Free DOF
= 1
Fixed DOF

(Boolean)

  
WZ Code for grid velocity in direction Z.
= 0
Free DOF
= 1
Fixed DOF

(Boolean)

  

Comments

  1. ALE links can only be deactivated/activated during Engine computation (/ALE/LINK/ON and /ALE/LINK/OFF).
  2. ALE links can also be added during an Engine run (Engine Input). Radioss will superimpose the grid velocities if different ALE links are defined in both Starter and Engine for the same node.
  3. The grnd_ID input is mandatory.
  4. Formulation 0 needs an unsortable group of nodes (/GRNOD/NODENS).