Selecting the Physics Models
The starting simulation file also includes predefined physics continua, Fluid Physics and Solid Physics, that are assigned to the fluid and the solid region, respectively. For each continuum, activate appropriate physics models to specify the fluid and the pipe behavior, including coupling at the fluid-solid interface.
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For the physics continuum,
, select the following models:
Group Box Model Space Three Dimensional Time Implicit Unsteady Material Liquid Flow Segregated Flow Gradients (Selected automatically) Equation of State User Defined EOS Viscous Regime Laminar
Specify the fluid initial velocity:
- Select the node and set Value to [0, 0, 0.001] m/s.
In this simulation, you model the
pipe as a linear elastic material. To solve for the displacement of the pipe in
response to the applied body load, activate the Solid Stress
model.
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For the physics continuum,
Solid Physics, select the following models:
Group Box Model Space Three Dimensional Time Implicit Unsteady Material Solid Optional Models Solid Stress Material Law Models (Selected automatically)
Define the material law that approximates the behavior of the solid:
- Expand the node.
- Rename the node to Isotropic Linear Elastic.
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For the
Isotropic Linear Elastic law node, select the following models:
Group box Model Material Stiffness Models Linear Elasticity Material Strain Measures Linear Strain (Small Strain) (selected automatically) Linear Elastic Material Models Isotropic Linear Elasticity - Save the simulation.