WebAn active transformation [1] is a transformation which actually changes the physical position (alibi, elsewhere) of a point, or rigid body, which can be defined in the absence of a coordinate system; whereas a passive transformation [2] is merely a change in the coordinate system in which the object is described (alias, other name) (change of … 数値流体力学（すうちりゅうたいりきがく、英: computational fluid dynamics、略称：CFD）とは、偏微分方程式の数値解法等を駆使して流体の運動に関する方程式（オイラー方程式、ナビエ-ストークス方程式、またはその派生式）をコンピュータで解くことによって流れを観察する数値解析・シミュレーション手法。計算流体力学とも。コンピュータの性能向上とともに飛躍的に発展し、航 …

Scalar mixing in homogeneous isotropic turbulence: A numerical …

WebIntermittency of the passive scalar is stronger than in the nonhelical rotating case, a result that is also confirmed by stronger non-Gaussian tails in the probability density functions … WebAbstract Passive scalar behavior is important in turbulent mixing, combustion, and pollution and provides impetus for the study of turbulence itself. The conceptual framework of the … いらすとや お金を払う人

数値流体力学 - Wikipedia

WebThe passive scalar model can be used when changes in scalar concentrations do not influence (hence "passive") the physical properties of the flow like density or viscosity. … WebApr 10, 2024 · Passive scalar turbulence is the study of how a scalar quantity, such as temperature or salinity, is transported by an incompressible fluid. This process is modeled by the advection diffusion equation ∂tgt + ut ⋅ ∇gt– κΔgt = st, where gt is the scalar quantity, ut is an incompressible velocity field, κ > 0 is the diffusivity ... WebApr 10, 2024 · Passive scalar turbulence is the study of how a scalar quantity, such as temperature or salinity, is transported by an incompressible fluid. This process is modeled by the advection diffusion equation ∂tgt + ut ⋅ ∇gt − κΔgt = st, where gt is the scalar quantity, ut is an incompressible velocity field, κ > 0 is the diffusivity ... p3 raccoon\u0027s