INTERFACE_SURFACE_TENSION

This command enters a distance- and velocity-dependent function that is added to the Gibbs energy of the phase at left side of a specified interface. This can then be used to emulate the effect of surface tension on the equilibrium between at the phase interface or limited phase mobility. This command is similar to the SET_SURFACE_TENSION command but more flexible because if there is more than one interface in a cell, the user can add different Gibbs energy expressions to different interfaces, each specified by the two neighboring phases.

Syntax	INTERFACE_SURFACE_TENSION
Prompt	PHASE ON LEFT SIDE OF INTERFACE The name of the phase on the left side of the specified interface. PHASE ON RIGHT SIDE OF INTERFACE The name of the phase on the right side of the specified interface. Function F(X,V,TIME,T): Enter a function which adds to the Gibbs energy expression for the phase located at the lower (left) side of the interface. The expression is multiplied with the volume per mole substitutional atoms (10-5m³/mole). This command is also used to simulate a limited interfacial mobility control where the energy function is a function of the interface velocity. It is used to enter the surface energy to enable coarsening. However, it can also be used to simulate a case with a limited interfacial mobility. For detailed syntax for the function, see the SET_SURFACE_TENSION command.

Syntax

Prompt

PHASE ON LEFT SIDE OF INTERFACE

The name of the phase on the left side of the specified interface.

PHASE ON RIGHT SIDE OF INTERFACE

The name of the phase on the right side of the specified interface.

Function F(X,V,TIME,T):

Enter a function which adds to the Gibbs energy expression for the phase located at the lower (left) side of the interface. The expression is multiplied with the volume per mole substitutional atoms (10-5m³/mole). This command is also used to simulate a limited interfacial mobility control where the energy function is a function of the interface velocity.

It is used to enter the surface energy to enable coarsening. However, it can also be used to simulate a case with a limited interfacial mobility.

For detailed syntax for the function, see the SET_SURFACE_TENSION command.