*GAP CONVECTION

Define Nusselt number for gap convection.

This option is used to provide the Nusselt number ( N u ) to calculate the convective coefficient for heat transfer between the gap flow and both the top and bottom surfaces of a coupled temperature-pore pressure cohesive element. It must be used in conjunction with the MATERIAL option.

This page discusses:

See Also
In Other Guides
Defining Thermal Convection for a Cohesive Element

ProductsAbaqus/Standard

TypeModel data

LevelPartPart instanceAssembly

Optional parameters

DEPENDENCIES

Set this parameter equal to the number of field variables on which the gap convection depends.

TYPE

Set TYPE=FLUX (default) to define a constant flux solution for convective heat transfer ( N u = 8.235 ).

Set TYPE=TEMPERATURE to define a constant temperature solution for convective heat transfer ( N u = 7.54 ).

Set TYPE=TABULAR to specify that the Nusselt number is dependent on temperature and/or field variables.

Data lines to define the temperature and/or field variable-dependent Nusselt number for TYPE=TABULAR

First line

  1. Nusselt number.

  2. Temperature.

  3. First field variable.

  4. Second field variable.

  5. Etc., up to six field variables.

Subsequent lines (only needed if the number of field variables is greater than six)
  1. Seventh field variable.
  2. Etc., up to eight field variables per line.

Repeat this set of data lines as often as necessary to define the Nusselt number as a function of temperature and other predefined field variables.