CFD code validation: should you believe those experimentalists?

Our research group builds and operates fluid mechanics experiments that generate data to validate computation fluid dynamics (CFD) codes. Analysts use the data to check their modelling and simulations against the real world, i.e., nature. Such studies require high bandwidth "whole field" measurements, which are obtained with specialized instruments that produce images nearly as beguiling as CFD graphics. But are they reliable? Unlike conventional point sensors such as thermocouples, exotic instruments are not delivered with NIST-traceable calibration certificates. How does the experimentalist establish the accuracy of data that might consist of tens of thousands of points across a flow field? Can you analysts (and you're nearly all analysts) trust such data to validate your simulations?

This talk will present the basic physics behind two fascinating optical instruments used for fluid dynamics experiments: particle image velocimeters and fiber optic distributed temperature sensors. We'll show that establishing accuracy of these advanced techniques is a work in progress. Analysts should trust, but verify.

July 15, 2014 at 10:00am

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See also: MAX Fluid Dynamics Facility - NE website

Printable version of this abstract: CFD code validation data: should you believe those experimentalists?.

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