Improved CFD Methodology and Workflow Using Solution-Based Adaption in Ansys Fluent
Speaker: Adam Norman, ANSYS Inc.
Presentation
Seminar Slide Deck (PDF-4.2MB)
Abstract
The current resurgence in super- and hypersonic technologies has highlighted the need to accurately and efficiently simulate these complex systems using high-fidelity computer simulations. With the extreme costs of flight testing and the limited capabilities of ground-based wind tunnels, computer simulation is a key-enabling technology to stay ahead in the design and analysis of such vehicles. One of the most time-consuming tasks in any computer simulation is the generation of a high-quality mesh for complex geometries. If the geometry is intended to be analyzed over a wide range of conditions, this process can be even more cumbersome and time-consuming. Knowing precisely where phenomena such as shocks and wakes will develop a priori is very difficult if not impossible for these complex shapes. As a consequence, in order to ensure proper resolution of these phenomena for a variety of flow conditions, a general over-refinement of the mesh in non-key areas usually occurs. This over-refinement leads to longer preprocessing and solve times and, as consequence, an elongated design process in a highly competitive sector.
In this webinar, a methodology will be presented that obviates the problem of over-refinement without compromising the accuracy of the CFD solution, with an overall result of an improved design process. In this workflow, a Hessian-based adaption criteria is used to capture the important flow features starting from a relatively coarse and non-finely tuned mesh of an external flow calculation. Additionally, a new adaption methodology will be presented to capture flame propagation for combustion related applications.
Biography
