Setting Up the Physics Models
Physics models define the primary variables of the simulation and what mathematical formulation is used to generate the solution.
Physics continua are required for the following:
-
anode and cathode active materials
-
anode and cathode collectors
-
electrolyte regions and separator, represented by one fluid continuum, with additional porosity defined for the separator.
Simcenter STAR-CCM+ creates a physics continuum, Physics 1, automatically when you generate a mesh.
To select the physics models:
- Rename the Anode AM Physics. node to
-
For the physics continuum,
Auto-select recommended models is activated and select the following models in order:
, make sure that
Group Box
Model
Space Three Dimensional (selected automatically)
Time
Implicit Unsteady
Material
Solid
Optional Models
Segregated Solid Energy
Gradients (selected automatically)
Equation of State
Constant Density
Optional Models
Electrochemistry
Electrochemistry
Li-Ion Battery Cell
Optional Models
Li-Ion Concentration
Li-Ion Electric Potential
Cell Quality Remediation
- Click Close.
-
To review the models, open the
node.
To create physics continua for the other solid materials, copy the Anode AM Physics continuum:
- Right-click the Copy. node and select
-
Right-click the
Continua node and select
Paste.
Simcenter STAR-CCM+ adds a copy to the feature tree.
- Repeat the paste process two more times.
-
Rename the copies as follows:
-
Anode Collector Physics
-
Cathode AM Physics
-
Cathode Collector Physics
-
Next, you create a fluid physics continuum for the electrolytes and separator:
- Create a physics continuum.
- Rename the Electrolyte Physics. node to
-
For the physics continuum,
, select the following models in order:
Group Box
Model
Space
Three-Dimensional
Time
Implicit Unsteady
Material
Liquid
Flow
Segregated Flow
Gradients (selected automatically)
Viscous Regime
Laminar
Equation of State
Constant Density
Optional Models
Electrochemistry
Electrochemistry
Li-Ion Battery Cell
(Li-Ion Concentration and Li-Ion Electric Potential are selected automatically)
Energy
Segregated Fluid Temperature
Optional Models
Cell Quality Remediation
- Click Close.