# Stratified Flow

### Salt Water Dam Break in Freshwater

– Density salt water: 1010.0 kg/m3

– Density fresh waterr: 998.207 kg/m3

### Temperature induced Gravity Current Front with Free Surface Motion

##### Experimental Setup

– Rectangular basin: 3.0m long, 0.2m wide, 1.0m high

– Water level: 0.8m

– Collapsing cold water column with 4°C into warmer water with 20°C

– Density water 4°C: 999.972 kg/m3

– Density water 20°C: 998.207 kg/m3

##### Numerical Setup

– Grid: dx = 0.01m and 600.000 cells

– Free Surface: Level Set Method

– Initialization: Hydrostatic pressure

– Convection discretization: WENO

– Time discretization: 3rd-order Runge-Kutta

– Pressure: Projection method

– Turbulence: LES Smagorinsky

##### Results

Fig. 1: Temperature distribution at t=0.0s

Fig. 2: Temperature distribution at t=15.0s

Fig. 3: Velocity distribution at t=15.0s

Fig. 4: Temperature distribution at t=30.0s

Fig. 5: Velocity distribution at t=30.0s

Fig. 6: Temperature distribution at t=45.0s

Fig. 7: Velocity distribution at t=45.0s

Fig. 8: Free surface elevation for different time steps along the center line of the basin