Physics
3D fluid (LBM)
Three-dimensional flow with a turbulence model and tracers.
What happens
A three-dimensional fluid stirred by a steady force: glowing tracers ride the flow and trace out its swirling structure, while the mid-plane slice cuts the velocity field open. Lower the relaxation to make the fluid livelier; orbit around to see the vortices in depth.
Equations used in the module
Equations BGK: f_i(x+c_iΔt,t+Δt) = f_i − (f_i−f_i^eq)/τ + F_i f_i^eq = w_iρ[1+3c_i·u+4.5(c_i·u)²−1.5u²] ν = (τ−½)/3; ν_t = (C_sΔ)²|S|
