Simulations of cavity stabilized flames

What is it about?

A high-order immersed boundary method is demonstrated that allows for the simulation of complex geometries in a DNS code. Both rectangular and ramp cavity stabilized flames are investigated and compared. The ramp cavity improves entrainment of fresh reactants from the high-speed region as expected. Further, fundamental differences between 2D and 3D turbulent simulations are elicited demonstrating the shortcomings of 2D turbulent simulations.

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Why is it important?

DNS is crucial to understanding the complex interactions of chemistry and turbulence in cavity stabilized flames as other simulation methods that do not resolve all the turbulent scales can not capture these phenomena accurately. Further, with the implementation of the immersed boundary method the realistic scaled-down ramp cavity can be simulated enabling the comparison with experiments and the development of turbulence closure models.