Fluid Pipe Element Library

This section provides a reference to the fluid pipe elements available in Abaqus/Standard.

This page discusses:

See Also
Fluid Pipe Elements
Thermal Fluid Pipe Elements
In Other Guides
*FLUID PIPE SECTION
*FLUID PIPE FLOW LOSS
*FLUID PIPE THERMAL
*FLUID PIPE WALL

ProductsAbaqus/Standard

Element Types

2D Pore Pressure Element

FP2D2

2-node linear

Active Degrees of Freedom

8

Additional Solution Variables

None.

2D Coupled Temperature–Pore Pressure Elements

FP2D2T

6-node linear

FP2D2AT

8-node linear, annular

Active Degrees of Freedom

8 at the first two nodes of element connectivity

11 at all nodes

Additional Solution Variables

None.

3D Pore Pressure Element

FP3D2

2-node linear

Active Degrees of Freedom

8

Additional Solution Variables

None.

3D Coupled Temperature–Pore Pressure Elements

FP3D2T

6-node linear

FP3D2AT

8-node linear, annular

Active Degrees of Freedom

8 at the first two nodes of element connectivity

11 at all nodes

Additional Solution Variables

None.

Nodal Coordinates Required

2D: X, Y

3D: X, Y, Z

Element Property Definition

The fluid pipe elements FP2D2 and FP3D2 are defined by two nodes, which cannot be coincident (a zero-length pipe is not allowed).

The thermal fluid pipe elements FP2D2T and FP3D2T have six nodes. Two nodes define the fluid pressure and temperature, and four nodes define the wall temperatures. The nodes that define the pipe wall are coincident with the nodes that define the pore pressure degrees of freedom.

The annular thermal fluid pipe elements FP2D2AT and FP3D2AT have eight nodes. Two nodes define the fluid pressure and temperature, and the remaining six nodes define the wall temperatures.

You must associate a fluid pipe section with a set of fluid pipe elements.

Input File Usage

FLUID PIPE SECTION, ELSET=name

Element-Based Loading

Distributed Loads

Distributed loads are specified as described in Distributed Loads.

*dload
  1. Load ID (*DLOAD): GRAV
  2. LT−2

  3. Gravity loading in specified direction (magnitude is input as acceleration).

Element Output

FPDPRESS

Pressure drop across the element.

FPMFL

Mass flow rate through the element.

FPFLVEL

Velocity of the fluid flowing through the element.

Node Ordering on Elements