Abaqus Verification Guide  


4.1.17 UFLUID

Product: Abaqus/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    SPRING1   

Feature tested

User subroutine to define fluid density and fluid compliance for an ideal gas.

Problem description

The fluid is modeled using a two-dimensional fluid block that measures 1 × 1 with unit thickness. The user-defined fluid is modeled as an ideal gas with the following properties:

Ambient pressure, = 14.7
Absolute zero temperature, = –460.
Reference density, = 10.0
Reference pressure for density, = 0.
Reference temperature for density, = 200.

Loading:

The following five steps are executed:

  1. Load the fluid to induce a pressure of 100.0 units.

  2. Increase fluid temperature to 300.0.

  3. Add prescribed amount of fluid.

  4. Remove prescribed amount of fluid.

  5. Decrease fluid temperature to 200.0.

Results and discussion

The results match the exact solution.

Input files

ufluidxx.inp

Input file for this analysis.

ufluidxx.f

User subroutine UFLUID used in ufluidxx.inp.