Immersed boundary method unsupported features

This page lists the flow solver features that are not yet supported by the immersed boundary method.

Note:

Immersed boundary method is not supported in the Multiphysics solver environment.

Unsupported simulation objects

• Flow Blockage: Porous Blockage - Isotropic and Porous Blockage - Orthotropic types

• Flow Boundary Conditions: Recirculation Loop, Convective Outflow, Bursting Membrane, and Flap typesFor Internal Fans, only velocity-specified magnitude is supported.

• Flow Convergence: Fluid Domain Subset type

• Flow Surface: Boundary Flow Surface with Obstructions and Embedded Flow Surface with Obstructions types

• Mixing Plane: all types

• Moving Frame of Reference: all types

• Particle Injection

• Periodic Boundary Condition: all types

• Report: all types

• Selective Results

• Supersonic Inlet

Internal Fan flow boundary condition and Screen simulation objects are not supported in models that include homogeneous gas mixtures, immiscible fluid mixtures, or turbulence models.

Unsupported loads and constraints

• Thermal Loads: you cannot define the Heat Load, Heat Flux and Heat Generation types on the fluid 3D cells of the immersed boundary meshes.Note: You can define the Heat Load and Heat Flux thermal load types on: 2D and 3D solid elements in a coupled thermal-flow analysis.Null shell elements that coat immersed polygon faces in a flow only analysis.You can only define Heat Generation thermal load type on 3D solid elements in a coupled thermal-flow analysis.

• Initial Conditions: all types

• Mapping

• Temperature

Note:

You cannot define these constraints on the fluid 3D cells of the immersed boundary meshes, but you can still define them on solid elements in a coupled thermal-flow analysis. In a flow only analysis, you can define the Temperature constraint also on null shell elements that coat immersed polygon faces.

Unsupported modeling objects

• Fan Speed Controller

• Immiscible Fluid Mixture

• Thermostat

Other unsupported features

• Multiple enclosures with separate fluid materials

• Humidity modeling

• Hybrid wall function

• Semi-permeable interface

• Rotating and translating flow surfaces

• Particle tracking

• Only the following turbulence models are supported: laminar flow, mixing length, standard k-ε, and SST.

• Spatial and time dependency on flow boundary conditions

Learn more

CFD simulation using the immersed boundary method

Immersed boundary meshing

Look up more details

Geometry preparation for immersed boundary method

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Immersed boundary method unsupported features, Simcenter 3D 2021.1 Series

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