## Students Visualizations

 Visualization of a jet Visualization of a jet using the smoke of a cigarette. A desk lamp, visible on the left, has been used to lighten the smoke. (Photo: Giuseppe Pipia, 2015)     Higher resolution image Flow visualization Visualization of the flow produced by a cigarette. A desk lamp has been used to lighten the smoke. (Photo: Giuseppe Pipia, 2015)     Higher resolution image Poiseuille channel flow (Re=10000, k=5, Φ=π/2, antisymmetric initial condition). Perturbation velocity field in the physical plane (z, y) normal to the streamwise direction, x. See the MOVIE for the complete temporal evolution. (Andrea Borio, Giuseppe Craparotta, Gloria Scaletta, Fluid Dynamics, Master Degree in Mathematical Engineering, 2012) Poiseuille channel flow (R=10000, k=0.9, symmetric initial condition, Φ=π/12). Perturbation velocity field in the physical plane (x, y) normal to the spanwise direction, z. See the MOVIE for the complete temporal evolution. (Alessandro Bay, Melania Carfagna, Anna Sapienza, Fluid Dynamics, Master Degree in Mathematical Engineering, 2012) Homogeneous and isotropic turbulence: Pseudocolor plot for the dimensionless velocity component u, 256^3 grid. (Fabrizio Donati, 2011) Homogeneous and isotropic turbulence: Isosurface plot of vorticity magnitude. Top: |ω| < 1 (left) and 1 <|ω| < 2 (right). Middle: 2 < |ω| < 3 (left) and 3 < |ω| < 4 (right). (Fabrizio Donati, 2011) Homogeneous and isotropic turbulence: Velocity vector plot 0 ÷ 6 (cyan to black) on a vorticity magnitude pseudocolor plot 0 < |ω| < 4 (yellow to red) for different filtered fields. Top left: reference field. Top right: filament 0-150/50. Bottom left: cross 0-20. Bottom right: cross 30-150. (Fabrizio Donati, 2011) Turbulent channel flow. Direct numerical simulation, Re_τ=180. Streamwise velocity fluctuations at y+=21.6. (The mean flow is from left to right) (2010). Turbulent channel flow. Direct numerical simulation, Re_τ=180. Streamwise velocity fluctuations at y+=180. (The mean flow is from left to right) (2010).