1. Complexity of Geometry: Modern facade designs often have complex geometries, which pose a challenge for accurate mesh generation and simulation through CFD.
2. Scale: CFD simulations must be performed at an appropriate scale, which can be challenging for large facades or buildings.
3. Material Properties: Accurate simulation results depend on the accurate representation of the material properties of facade components. Material properties of new materials or innovative fabrication techniques may be unknown or difficult to measure, which can lead to inaccuracies in simulation results.
4. Boundary Conditions: Accurate boundary conditions are critical for CFD simulations. Accurate representation of the surrounding environment, wind pressure, and other boundary conditions can be a challenge for facade design.
5. Simulation Time and Resources: CFD simulations can be computationally expensive, meaning that simulation times can be long and high-performance computing resources can be challenging to obtain.
6. Validation: CFD results must be validated against physical testing and real-world results. However, for new or innovative designs, there may be limited data available for validation.
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