About Connections | ||||||
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Valid connection pairs include:
- Output to input
- Input to output
- I/O to I/O (region to region)
The simplest type of connection is from an output of one component to an input of another. This signal represents a scalar variable.
Supported Component Pairings
Component types can be connected only in certain combinations.
The figure below describes the supported component pairings for a co-simulation experiment. Scalar inputs and outputs are represented by triangular ports, while region-to-region 3D interactions are represented by square ports.
Key:
- SXS—Standard-Explicit Subcycle
- SXL—Standard-Explicit Lockstep
- FSI—Fluid-Structure Interaction
- CHT—Conjugate Heat Transfer
The table below adds more detail, specifying which co-simulation coupling options are possible for each solver pairing. See the Related Topics for detailed descriptions of each option (column headings).
| Interaction | Solvers | Algorithm | Negotiation Method | Lead Actor | Implicit Coupling Possible? | Can Add FMU? | Number of Interactions Allowed | Can Combine with Other 3D-to-3D Interactions? | Comment |
|---|---|---|---|---|---|---|---|---|---|
| FSI | Standard-CFD | Gauss-Seidel (default) | Min (default) Max ConstantDT Master (any) | Standard (default) CFD | Yes (recommended for strong coupling) | Yes | 1 or 2 (if 3 components) | Yes | Recommended. Implicit coupling is more stable for strongly coupled physics. |
| Jacobi | Min (default) Max ConstantDT Master (any) | n/a | No | Yes | 1 or 2 (if 3 components) | Yes | Not recommended. Applies only to weakly coupled physics. | ||
| Explicit-CFD | Gauss-Seidel (default) | Max (default) ConstantDT Master (Explicit) | Explicit (default) CFD | No | Yes | 1 or 2 (if 3 components) | Yes | ||
| Jacobi | Max (default) ConstantDT Master (Explicit) | n/a | No | Yes | 1 or 2 (if 3 components) | Yes | Not recommended. Applies only to weakly coupled physics. | ||
| CHT | Standard-CFD | Gauss-Seidel | Min (default) Max ConstantDT Master (any) | CFD (default) Standard | No | Yes | 1 or 2 (if 3 components) | Yes | |
| Jacobi | Min (default) Max ConstantDT Master (any) | n/a | No | Yes | 1 or 2 (if 3 components) | Yes | Not recommended. Applies only to weakly coupled physics. | ||
| Explicit-CFD | Gauss-Seidel | Max (default) ConstantDT Master (Explicit) | CFD (default) Explicit | No | Yes | 1 or 2 (if 3 components) | Yes | ||
| Jacobi | Max (default) ConstantDT Master (Explicit) | n/a | No | Yes | 1 or 2 (if 3 components) | Yes | |||
| SXS | Standard-Explicit Subcycle | GandC | Max | Standard | No | No | 1 | No | |
| SXL | Standard-Explicit Lockstep | Gauss-Seidel Predictor | Min | Explicit | No | No | 1 or 2 (if 3 components) | No | |
| Logical-to-Logical | FMU-FMU | Gauss-Seidel (default) | ConstantDT | FMU | n/a | n/a | n | See FSI, CHT, SXS, or SXL row above | |
| Jacobi | ConstantDT | FMU | n/a | n/a | n | ||||
| Physical-to-Logical | Standard-FMU | Gauss-Seidel | Master (Standard) Min Max ConstantDT | Standard (default) FMU | No | Yes | n | See FSI, CHT, SXS, or SXL row above | |
| Jacobi | All | n/a | No | Yes | n | ||||
| Explicit-FMU | Gauss-Seidel | Master (Explicit) Min Max ConstantDT | Explicit (default) FMU | No | Yes | n | See FSI, CHT, SXS, or SXL row above | ||
| Jacobi | All | n/a | No | Yes | n | ||||
| CFD-FMU | Gauss-Seidel | Master (CFD) Min Max ConstantDT | CFD (default) FMU | No | Yes | n | See FSI, CHT, SXS, or SXL row above | ||
| Jacobi | All | n/a | No | Yes | n |