Researchers Unveil New Insights into Turbulent Fluid Flows in Combustion Flames
Scientists have long grappled with understanding turbulent fluid flows, with their chaotic nature hindering the creation of comprehensive universal models. Now, a collaborative team from RWTH Aachen University and CORIA, utilizing the Jülich Supercomputing Centre's supercomputer, is making strides in this complex field, focusing on combustion flames.
The research group employs direct numerical simulations (DNS) to study turbulence, a method that has gained traction with the increasing availability of high-performance computing (HPC) resources. By delving into the small-scale turbulence at the thin boundary of the flame, they aim to enhance the accuracy of less computationally demanding large eddy simulations (LES) for more efficient results on modest resources.
A key focus is the turbulent-non-turbulent interface (TNTI), which holds significant implications for understanding turbulent mixing. The team's goal is to improve models for combustion and mixing applications, where turbulence plays a pivotal role in chemical and industrial processes that rely on effective fluid mixing.
Intermittency, an irregular process with high amplitude, can both enhance mixing and combustion efficiency and, paradoxically, extinguish flames. As next-generation HPC systems may not fully capture these turbulent dynamics, each advancement increases the degrees of freedom and incorporates additional physics.
The collaborative research, conducted at the Jülich Supercomputing Centre, is pushing the boundaries of our understanding of turbulent fluid flows, particularly in the context of combustion flames. By improving models for combustion and mixing applications, the team's work has significant implications for various chemical and industrial processes that depend on effective fluid mixing.
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