Modelling in Hypersonic Fluid Dynamics
Speaker: David Petty
Affiliation: UNSW
Abstract
This presentation will cover two research topics in hypersonic fluid dynamics that may appeal to the applied mathematics community.
The first topic focuses on developing high-fidelity turbulence models that are computationally efficiency. Approximations that seek to exploit scale locality, such as perturbation renormalisation, have established themselves as the preferred first-principles based model order reduction approach to turbulence modelling. Derived variable-density turbulence spectra using the Sparse Direct-Interaction Approximation, and challenges of extending this modelling approach to compressible turbulence, will be presented.
The second topic is on numerical methods suitable for the simulation of high-enthalpy flows. In particular, how to numerically integrate state-to-state models (masters equations) of nonequilibrium effects in high-enthalpy flows. These models possess nonlinear stiffness due to variations over a large number of scales which makes computationally efficient integration challenging. Potential improvements to current standard implicit solvers and how best to implement these algorithms on heterogeneous architectures will be discussed.
About Applied and computational maths seminars
Our seminars bring together UQ's applied and computational mathematics communities.
UQ and invited scientists deliver the presentations, which are informal and promote discussion.
We welcome suggestions for speakers and topics from staff, students and visitors, and encourage students to share their work.
Our seminars are usually held on Thursdays from 3pm to 4pm.
To suggest a topic or speaker, and for more information, contact Dr Dietmar Oelz or Dr Cecilia Gonzalez Tokman.
Venue
Room: 443