Simulation with Fluent

Same parameters as the simulation with Jadim

$$\rho_{water} /\rho_{oil}$$ (kg/m3)

$$\nu_{water} /\nu_{oil}$$ (Pa.s) $$ \sigma_{oil/water} $$ (N/m) dt (s) inlet/outlet lenght (m) inlet velocity (m/s) mesh size (m) mesh size (cells) inlet Re
1000; 800 1;10 0.487 1e-3; 0.056; 0.025 0.2 0.76x0.44 122x88

10

 

 

The results are almost the same, the differences can be explained by the difference of the two codes the way to solve the equations are not the same.

The fluctuations observed on the outflow rate of oil are due to the bubbles of oil crossing the outlet.

 

Real parameters

$$\rho_{water} /\rho_{oil}$$ (kg/m3)

$$\nu_{water} /\nu_{oil}$$ (Pa.s) $$ \sigma_{oil/water} $$ (N/m) dt (s) inlet/outlet lenght (m) inlet velocity (m/s) mesh size (m) mesh size (cells) inlet Re
1000; 800 0.001;0.01 0.025 1e-3; 0.056; 0.025 0.024 0.76x0.44 244x176

1200

Decreasing the surface tension would increase the emulsion of the fluid and more bubbles would be created.

Compare with the last simulation, the viscosity has been divided by 1000, the velocity by 10 and therefore the Reynolds number obtained is 12000. If  the same velocity was kept before the Re number would have been 120000, which give a turbulent flow. That is why the velocity has been multiply by ten.

Compare with the viscosity, the decrease of the velocity is negligible.

Therefore it is shown the influence of the viscosity comparing the two simulations.