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Turbulence is typically observed on large scales, such as in atmospheric flows or astrophysical gas clouds, but the kinetic energy injected at these scales must eventually dissipate at comparatively smaller scales. In this talk I will explore where this kinetic energy goes, in both the subsonic and supersonic regimes, by using high resolution turbulence simulations. To characterise dissipative structures, I will answer the following questions. How long does it take for large scale kinetic energy injection to dissipate? And how is this dissipation correlated with key quantities such as the density and vorticity of the gas? On what scales is dissipation strongest? What is the dimensionality of the turbulent structures? |
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