Best Practice Advice AC7-02

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Best Practice Advice

Airflow in the human upper airways

Application Challenge AC7-02   © copyright ERCOFTAC 2020

Best Practice Advice

Key Fluid Physics

Briefly describe the key fluid physics/flow regimes which exert an influence on the DOAPs. Ideally this should draw together into a coherent picture the associated UFR descriptions together with any important interactions which are AC specific. Mention the UFRs associated with this AC that you have considered in drafting your best practice advice. Access the Knowledge Base to find the UFRs associated with your AC.

Application Uncertainties

List any uncertainties which make a high fidelity CFD model difficult to assemble. Typical examples might include:

• a gas leakage between two components which is difficult to resolve on practical meshes, andeven if it is resolved, the leakage flow conditions may not be known.
• flow conditions at inlet to the AC (or indeed other boundaries) which may be complex and not precisely known.
• fine details of the geometry are imprecise.

Briefly discuss the sensitivity of the DOAP predictions to these uncertainties and their impact on the BPA. In particular, can clear, unequivocal BPA be given or is it necessary to introduce appropriate caveats.

References

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Contributed by: S. C. Kassinos^a — 
^aDepartment of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia, Cyprus

Front Page

Description

Test Data

CFD Simulations

Evaluation

Best Practice Advice

© copyright ERCOFTAC 2020