Transport Properties

Use the Transport Properties node to define the fluid properties, including density and dynamic viscosity. Also define the diffusion coefficient and if applicable, the mobility and charge number.

D O M A I N S E L E C T I O N

From the Selection list, choose the domains to implement the physics boundary conditions. By default, All domains are included.

M O D E L I N P U T S

Define model inputs, for example, the temperature field if the material model uses a temperature-dependent material property. If no model inputs are required, this section is empty.

F L U I D P R O P E R T I E S

D I F F U S I O N

If materials have been added in the Materials node, select an option from the Bulk material list. Otherwise the list defaults to None and values or expressions need to be entered in the Diffusion coefficient Dc (SI unit: m2 /s) field.

The Diffusion coefficient is described for The Transport of Diluted Species

Interface in the COMSOL Multiphysics Guide.

Note

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