/MONVOL/LFLUID
Block Format Keyword Describes the pressure of a linear fluid using a monitored volume.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/MONVOL/LFLUID/monvol_ID/unit_ID | |||||||||
monvol_title | |||||||||
surf_IDex | |||||||||
Ascalet | AscaleP | ||||||||
fct_K | fct_Mtin | Fscale_K | Fscale_Mtin | ||||||
fct_Mtout | fct_Mpout | Fscale_Mtout | Fscale_Mpout | ||||||
fct_Padd | fct_Pmax | Fscale_Padd | Fscale_Pmax |
Definition
Field | Contents | SI Unit Example |
---|---|---|
monvol_ID | Monitored volume
identifier. (Integer, maximum 10 digits) |
|
unit_ID | Unit Identifier. (Integer, maximum 10 digits) |
|
monvol_title | Monitored volume
title. (Character, maximum 100 characters) |
|
surf_IDex | External surface
identifier. (Integer) |
|
Ascalet | Abscissa scale factor for
time based functions. Default = 1.0 (Real) |
|
AscaleP | Abscissa scale factor for
pressure based functions. Default = 1.0 (Real) |
|
Fluid
density. (Real) |
||
fct_K | Load curve identifier for
bulk modulus
. (Integer) |
|
Fscale_K | Load curve scale factor for bulk modulus or constant bulk modulus. 7 | |
fct_Mtin | Load curve identifier for
input mass flow rate
. (Integer) |
|
Fscale_Mtin | Load curve scale factor for input mass flow rate or constant input mass flow rate. 7 | |
fct_Mtout | Load curve identifier for
mass flow rate
. (Integer) |
|
Fscale_Mtout | Load curve scale factor for output mass flow rate or constant output mass flow rate. 7 | |
fct_Mpout | Load curve identifier for
output mass flow rate
as a function of
pressure. (Integer) |
|
Fscale_Mpout | Load curve scale factor for output mass flow rate or constant output mass flow rate. 7 | |
fct_Padd | Load curve identifier for
additional pressure
. (Integer) |
|
Fscale_Padd | Load curve scale factor for additional pressure or constant additional pressure. 7 | |
fct_Pmax | Load curve identifier for
maximum pressure
. (Integer) |
|
Fscale_Pmax | Load curve scale factor for maximum pressure or constant maximum pressure. 7 |
Comments
- The pressure inside the
monitored volume is defined as:
(1) - surf_IDex must be defined using segments associated with 4- or 3-nodes shell elements (possibly void elements) and not with /SURF/SEG.
- The shell elements that define the surface of the monitored volume should not be deleted or eroded.
- The volume must be closed and the normals must be oriented outwards.
- Abscissa scale factors are
used to transform abscissa units in airbag functions, for
example:
(2) Where, is the time.(3) Where, is the pressure.
- Fluid mass is computed
as:
(4) - If the load curve identifier
fct_ is defined, then the Fscale_ is a
scale factor for the load curve with a default value = 1.0:
If the load curve identifier fct_ is not defined, then Fscale_ defines a constant input value: