ME Seminar Series: Uncertainty Issues in Computational Fluid Dynamics and Heat Transfer

Dec 3

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Wednesday, December 3, 2014 - 11:30am to 1:00pm

Although computational fluid dynamics and heat transfer (CFD/HT) has advanced tremendously over the past few decades, serious concerns remain on the accuracy of its solutions. This is because CFD/HT, like any tool, whether mathematical or experimental, has inherent sources of errors. This talk will start with two simple examples on validation of CFD/HT, illustrating capabilities and limitations of well-known turbulence models via steady & unsteady RANS and to show when LES is truly needed. Since the integrity of the validation process depends on the integrity of the experimental data, uncertainties associated with steady and unsteady measurements of the heat transfer are discussed and some solutions proposed. Also, uncertainties associated with Newton's Law of Cooling and the usefulness of scaling dimensionless parameters are discussed for steady and unsteady conjugate heat-transfer problems.