*FLUID EXPANSION

Specify the thermal expansion coefficient for a hydraulic fluid.

This option is used to define thermal expansion coefficients for the hydraulic fluid model. It can be used only in conjunction with the FLUID BEHAVIOR option.

This page discusses:

Optional parameters
Data lines to define the thermal expansion coefficient

Optional parameters

DEPENDENCIES: Set this parameter equal to the number of field variable dependencies included in the definition of the thermal expansion coefficient, in addition to temperature. If this parameter is omitted, it is assumed that the thermal expansion coefficient depends only on temperature. See Material Data Definition for more information.
ZERO: Set this parameter equal to the value of $θ_{0}$ . The default is ZERO=0.

Data lines to define the thermal expansion coefficient

First line

Mean coefficient of thermal expansion, $α$ .
Temperature, $θ$ .
First field variable.
Etc., up to six field variables.

Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than six)

Seventh field variable.
Etc., up to eight field variables per line.

Repeat this set of data lines as often as necessary to specify $α$ as a function of $θ$ and field variables.