Numerical investigation of electro hydrodynamics (EHD) enhanced water evaporation using Large Eddy Simulation turbulent model

• The electric EHD on enhancement of evaporation rate is numerically investigated.
• The turbulent flow is modeled by Large Eddy Simulation (LES).
• The electric field effect is significant at the lower Reynolds numbers.
• The enhancement of evaporation rate becomes up to 2.25 times by applying EHD.

In this paper, the electric field effect on enhancement of the water evaporation rate in a channel is numerically investigated. The coupled equations of electrical field, flow field, temperature field and species concentration fields are discretized using Finite Volume Method (FVM) and the implicit/hybrid difference form. This equations are solved via SIMPLE algorithm and the Kaptsov hypothesis. The turbulent flow is modelled by Large Eddy Simulation (LES). The numerical results show that the water evaporation rate is increased with the presence of electric field, but the effect of electric field is diminished at high Reynolds number.