4.4 3D SUPG/PSGP Elements

4.4.1 Tet1_3D_SUPG element

Represents 3D linear pyramid element for transient incompressible flow analysis using SUPG/PSPG stabilization with equal order approximation of velocity and pressure fields. Each node has 3 degrees of freedoms (two components of velocity and pressure). The element features are summarized in Table 64.


PIC

Figure 29: Tet1_3D_SUPG element.





Keyword

TET1SUPG

Description

linear equal order approximation axisymmetric element

Specific parameters

[vof #(rn)][pvof #(rn)]



Unknowns

Three velocity components (V_u, V_v, and V_w) and pressure (P_f) are required in each node.

Approximation

Linear approximation of velocity and pressure fields.

Integration

exact

Loads

Constant boundary tractions are supported. Body loads representing the self-weight load are supported.

Multi-fluid analysis

The element has support for solving problems with two immiscible fluids in a fixed spatial domain. In the present implementation, a LevelSet tracking algorithm is used to track the position of interface. The material model should be of type Keywordtwofluidmat, that supports modelling of two immiscible fluids.

Status




Table 64: TET1SUPG element summary