Tagged: fluent, fluid-dynamics, General, General - FLUENT, Other
-
-
January 25, 2023 at 7:16 am
FAQ
ParticipantThe following restrictions exist for the macro heat exchanger models: 1. The core must be a 3D mesh with a cross-section that is approximately rectangular in shape. 2. The primary fluid streamwise direction (see Equation 6–1 in the Theory Guide) must be aligned with one of the three orthogonal axes defined by the rectangular core. 3. The pass-to-pass plane must be perpendicular to the primary fluid streamwise direction. 4. The two dimensions of the pass-to-pass plane can each be discretized into multiple macroscopic cells (macros), but in the direction perpendicular to this plane the macros cannot be subdivided. 5. It is highly recommended that the free-form Tet mesh is not used in the macro heat exchanger model. Instead, evenly distributed Hex/Wedge cells should be used for improved accuracy and a more robust solution process. 6. Flow acceleration effects are neglected in calculating the pressure loss coefficient. 7. For the simple effectiveness model, the primary fluid must have a capacity rate that is less than that of the auxiliary fluid. 8. Auxiliary fluid phase change cannot be modeled using the NTU model. 9. The macro-based method requires that an equal number of cells reside in each macro of equal size and shape. 10. The auxiliary fluid flow is assumed to be 1D. 11. The pass width has to be uniform. 12. Accuracy is not guaranteed when the mesh is not structured or layered. 13. Accuracy is not guaranteed when there is upstream diffusion of temperature at the inlet/outlet of the core. 14. Non-conformal meshes cannot be attached to the inlet/outlet of the core. An extra layer has to be created to avoid it.
-

Introducing Ansys Electronics Desktop on Ansys Cloud
The Watch & Learn video article provides an overview of cloud computing from Electronics Desktop and details the product licenses and subscriptions to ANSYS Cloud Service that are...

How to Create a Reflector for a Center High-Mounted Stop Lamp (CHMSL)
This video article demonstrates how to create a reflector for a center high-mounted stop lamp. Optical Part design in Ansys SPEOS enables the design and validation of multiple...

Introducing the GEKO Turbulence Model in Ansys Fluent
The GEKO (GEneralized K-Omega) turbulence model offers a flexible, robust, general-purpose approach to RANS turbulence modeling. Introducing 2 videos: Part 1 provides background information on the model and a...

Postprocessing on Ansys EnSight
This video demonstrates exporting data from Fluent in EnSight Case Gold format, and it reviews the basic postprocessing capabilities of EnSight.
- How can I create a Cell Register from a Cell Zone?
- Left-handed faces troubleshooting
- How to overcome the model information incompatible with incoming mesh error?
- ANSYS Fluent: Introduction to the GEKO Turbulence Model Part I
- Delete or Deactivate Zone in Fluent
- How to create and execute a FLUENT journal file?
- ANSYS System Coupling: Two Way Fluid Structure Interaction – Part 1
- Running Python Script from Workbench
- What are the requirements for an axisymmetric analysis?
- How can I Export and import boxes / Systems from one Workbench Project to another?
© 2023 Copyright ANSYS, Inc. All rights reserved.