******************* **shell_diff_flux** ******************* :: EQ =shell_diff_flux {Galerkin_wt} SH_J {Interpol_fnc} ----------------------- **Description / Usage** ----------------------- This card provides information for solving a conservation equation for the total surface diffusive flux in a 2-dimensional bar (or shell) element. Note that this equation is not yet available in three dimensions and is in fact untested at this time. The card entries are as follows: +-------------------+----------------------------------------------------------+ |**shell_diff_flux**|Name of the equation to be solved. | +-------------------+----------------------------------------------------------+ |{Galerkin_wt} |Two- or four-character value that defines the type of | | |weighting function for this equation, where: | | | | | | * **Q1**-Linear | | | * **Q2**-Quadratic | +-------------------+----------------------------------------------------------+ |**SH_J** |Name of the variable associated with the shell curvature | | |equation. | +-------------------+----------------------------------------------------------+ |{Interpol_fnc} |Two- or four-character value that defines the | | |interpolation function used to represent the variable | | |**SH_J** where: | | | | | | * **Q1**-Linear Continuous | | | * **Q2**-Quadratic Continuous | +-------------------+----------------------------------------------------------+ | |Multiplier for diffusion terms (in this case, the whole | | |equation). | +-------------------+----------------------------------------------------------+ ------------ **Examples** ------------ The following is a sample card that uses bilinear shell diffusive flux interpolation and weight function: :: EQ = shell_diff_flux Q2 SH_J Q2 1.0 ------------------------- **Technical Discussion** ------------------------- This is only a preliminary implementation of a shell quantity conservation equation. It is not currently operational. When it is fully implemented, the number of required equation term multiplier entries will be adjusted acordingly. -------------- **References** -------------- No References.