Building-block-flow computational model for large-eddy simulation of external aerodynamic applications

Area of Science:

• Engineering
• Computational Fluid Dynamics
• Fluid Mechanics

Background:

• Computational fluid dynamics (CFD) is crucial for engineering design but lacks a universal model for all flow phenomena.
• Current models face limitations due to inherent assumptions, affecting accuracy across diverse flow conditions.

Purpose of the Study:

• Introduce a novel closure model for wall-modeled large-eddy simulation (LES) to overcome existing limitations.
• Develop a more accurate and versatile CFD tool applicable to complex engineering challenges.

Main Methods:

• The Building-block Flow Model (BFM) integrates physics from simple flow cases to predict complex scenarios.
• BFM unifies boundary and bulk flow modeling, accounts for numerical errors, and handles complex geometries.

Main Results:

• BFM demonstrated comparable or superior predictive capabilities to state-of-the-art models in five test cases.
• Key quantities were accurately predicted, including simulations of an aircraft in landing configuration.

Conclusions:

• The BFM offers a promising new approach for developing accurate and adaptable CFD closure models.
• This model facilitates the accurate representation of diverse flow physics across various engineering applications.