Deforming Electrode Surface
Use the Deforming Electrode Surface multiphysics coupling to model deformation of the geometry due to an electrochemical deposition-dissolution process.
The node uses the deposition-dissolution velocity of an Electrode Surface boundary in an Electrochemistry interface to apply a deformation velocity on to a deforming boundary.
Special conditions for the tangential velocity at points (2D) and edges (3D) shared with nondeforming surfaces apply, as described in the theory section.
The node, available as a multiphysics coupling node, is only applicable when both the Electrochemistry interface (Primary/Secondary/Tertiary Current Distribution or Lithium-Ion Battery or Battery with Binary Electrolyte) and a Deformed Geometry node are added to a component.
Moving Boundary Smoothing
Certain electrode deformation problems are inherently unstable. The Moving Boundary Smoothing will stabilize the moving boundary by applying a fictitious surface tension. Use the Moving boundary smoothing tuning parameter, δmbs, to control smoothing. A higher value means more smoothing.
Recommended settings in the coupled Deformed Geometry Interface
Predefined multiphysics interfaces are available from the model wizard that will automatically add and set up the coupling between a current distribution interface and the deformed geometry node. However, you can also add a Deformed Geometry interface manually to an already existing model.
The following settings are recommended in the Deformed Geometry interface if you are manually setting up the coupling between a Deformed Geometry interface and an Electrochemistry interface using the Deforming Electrode Surface and Nondeforming Boundary multiphysics coupling nodes:
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At the Deformed Geometry interface node, change the Geometry shape order to 1 and Mesh smoothing type to Hyperelastic
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Clear all the check boxes at the default Prescribed Mesh Displacement boundary feature node
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Add Free Deformation domain node and make sure it is selected on the deforming domains of the geometry
Tangential Velocities at the Intersection Between a Depositing and a Nondepositing Boundary