SMS:RMA4 Material Properties

File:RMA 4 MP.jpg

RMA4 Material Properties dialog

The RMA4 Material Properties dialog is reached through the RMA4 | Material Properties... menu command in the Mesh module.

The dialog has the following options:

• Material list – a list of available materials is populated on the left side of the dialog. Selecting a material allows the diffusion to be changed for the material.
• Overide global specification – When turned on the global diffusion will not be used for the material.
• Diffusion coefficient method – Specifies using diffusion coefficients to approximate turbulence.
• Peclet number method – Specifies the use of a Péclet number to determine diffusion.
• Dx – Specifies diffusion in the x direction.
• Dy – Specifies diffusion in the y direction.
• Peclet Number – Enter the Péclet number value.
• Minimum Velocity – The lowest velocity allowed for diffusion.
• General Material Properties – Brings up the Materials Data dialog.

Diffusion

Because RMA4 does not have the ability to model turbulence, diffusion coefficients may be used to approximate turbulence. By assigning a diffusion coefficient in the x and y directions for each material, the flow over that material will be altered somewhat to provide an approximation of turbulent flow over that region. A value of -1.0 may be applied to allow normal flow over the material. Positive values provide turbulence. The higher the value, the greater the effect is.

Related Topics

• RMA4