CPCE Industry Standards & Application in Engineering Design 2

Question 1

According to ASME V&V 20, what is the primary purpose of validation in CFD simulations?

Accepted Answer

To assess how accurately a model represents physical reality

Answer

ASME V&V 20 defines validation as the process of determining how accurately a computational model represents the real physical system.

Question 2

Which AIAA standard provides guidelines for assessment of experimental uncertainty in CFD validation experiments?

Accepted Answer

AIAA G-077

Answer

AIAA G-077 provides guidelines for the estimation and reporting of uncertainty in wind tunnel testing used for CFD validation.

Question 3

In the context of ISO 9001:2015, which element is most critical when establishing a CFD simulation workflow for aerospace components?

Accepted Answer

Documenting process controls and traceability

Answer

ISO 9001:2015 requires documented information for process control and traceability to ensure quality management system compliance.

Question 4

What does the concept of 'numerical diffusion' relate to in CFD industry practice and mesh design standards?

Accepted Answer

Artificial smoothing introduced by low-order discretization schemes

Answer

Numerical diffusion is a truncation error artifact of low-order upwind schemes that artificially smears gradients, addressed by using higher-order schemes or finer meshes.

Question 5

Under ASME PTC 19.1, when reporting CFD validation results, which combination must be included?

Accepted Answer

Bias error, precision error, and total uncertainty

Answer

ASME PTC 19.1 requires reporting of both bias and precision error components to fully characterize total measurement uncertainty.

(CPCE) Certified Professional CFD Engineer Practice Test

(CPCE) Certified Professional CFD Engineer Practice Test

CPCE Industry Standards & Application in Engineering Design 2