Variables Inactive in Some Regions

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Variables Inactive in Some Regions

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FlexPDE supports the ability to restrict some variables and equations to act only in specified REGIONS.  This feature is controlled by declaring variables to be INACTIVE in some regions.


   var1, var2 {,...}



  INACTIVE(var1, var2 {,...} )


In solving the EQUATIONS for these variables, it will be as if the INACTIVE regions had not been included in the domain definition.  Boundaries between regions in which the variables are active and those in which they are inactive will be treated as exterior boundaries for these variables.  Boundary conditions may be placed on these boundaries as if they were the exterior boundary of the system.