/GAUGE/SPH
Block Format Keyword Defines SPH gauges.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/GAUGE/SPH/gauge_ID/unit_ID | |||||||||
gauge_title | |||||||||
node_ID | Fcut | shell_ID | DIST |
Definition
Field | Contents | SI Unit Example |
---|---|---|
gauge_ID | Gauge
identifier (Integer, maximum 10 digits) |
|
unit_ID | Unit Identifier (Integer, maximum 10 digits) |
|
gauge_title | Gauge title (Character, maximum 100 characters) |
|
node_ID | Node
identifier (Integer) |
|
Fcut | Cutoff
frequency (Real) |
|
shell_ID | Shell identifier. Only
4-node shells can be used. (Integer) |
|
DIST | Distance between gauge and
shell surface
Default = 0 (Real) |
Comments
- SPH pressure gauges can be defined by:
- A node using a node identifier (node_ID > 0), or
- A shell element (shell_ID) and a distance (DIST). In this case node_ID must be equal to 0.
- The SPH approximation is used for
measuring the pressure (density) at the gauge location:
(1) with , , , and , respectively being the location, diameter, volume, and the pressure of particle .A correction at order 0 applies in the above equation, whatever the correction order which are specified into the SPH properties.
- The pressure may be filtered (a 4-pole Butterworth filter is used).
- SPH pressure gauges and ALE or FVM gauges (/GAUGE) cannot share the same gauge_ID.