Computational fluid dynamics(CFD)is a simulation method that emulates the real fluid flow in a digital environment,providing quantitative solutions to the fluid mechanics problems.In the past decade,CFD has gained prominence in reconstructing the function and paleoecology of ancient and mysterious fossils through numerical simulations of the fluid flows.While various turbulence models have been developed in CFD,earlier computer experiments on extinct organisms mostly relied on the Reynolds-averaged Navier-Stokes(RANS)equations.In this study,we conducted a biomechanical analysis using'regular'archaeocyaths as a case study,employing the large eddy simulations(LES)turbulence model.Additionally,the RANS model was applied for comparative simulations under identical fluid dynamic settings.The CFD analyses accurately replicate the hydrodynamic conditions on the seafloor where archaeocyaths lived.Both RANS and LES experiments unveil the intricate influence of the skeletal motifs of archaeocyaths on the flow physics within and beyond their central cavities.Compared to the RANS model,the LES model exhibits higher precision in the quantitative analysis of paleoecology.
关键词
大涡模拟/计算流体力学/古生态/生物力学/古杯动物
Key words
Large eddy simulation/Computational fluid dynamics/palaeoecology/biomechanics/archaeocyaths
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