Submodel for no convection in transverse directions
param (parameter class) – The parameters to use for this submodel
options (dict, optional) – A dictionary of options to be passed to the model.
A public method that creates and returns the variables in a submodel which can be created independent of other submodels. For example, the electrolyte concentration variables can be created independent of whether any other variables have been defined in the model. As a rule, if a variable can be created without variables from other submodels, then it should be placed in this method.
The variables created by the submodel which are independent of variables in other submodels.