Hydrostatic fluid

This problem contains basic test cases for one or more Abaqus elements and features.

This page discusses:

ProductsAbaqus/Standard

Features tested

This section provides basic verification tests for the fluid behavior associated with fluid elements that are generated in Abaqus/Standard when the fluid cavity capability is used.

Elements tested

F2D2

F3D4

Problem description

Material:

Incompressible fluid

Reference density, ρR = 10.0

Reference temperature, θ0 = 100.

Thermal expansion:

Expansion Coeff.Temperature
1.E−5 0 
4.E−5 300.

Initial temperature, θI = 200.

Nearly incompressible fluid

Reference density, ρR = 10.0

Bulk compressibility:

Bulk modulusTemperature
4.E+5 0.
1.E+5 300.

Reference temperature, θ0 = 100.

Thermal expansion:

Expansion Coeff.Temperature
1.E−5 0.
4.E−5 300.

Initial temperature, θI = 200.

Pneumatic fluid

Ambient pressure, pA = 14.7

Absolute zero temperature, θZ = −460.

Molecular weight, M⁢W = 448.98

Universal gas constant, R~ = 0.

(The units are not important.)

Results and discussion

The tests in this section are set up as cases of homogeneous deformation of a “block” of hydrostatic fluid. The fluid pressure, temperature, and cavity volume at the cavity reference node are the results of interest. The pressure reported for the pneumatic fluid is the gauge pressure, not the absolute pressure.

The following five steps are executed:

  1. Load

  2. Increase fluid temperature

  3. Add prescribed amount of fluid

  4. Remove prescribed amount of fluid

  5. Decrease fluid temperature

Input files

mfhhit1ahc.inp

Three-dimensional cavity with incompressible fluid.

mfhhnt1ahc.inp

Three-dimensional cavity with nearly incompressible fluid.

mfhpno1ahc.inp

Three-dimensional cavity with pneumatic fluid.