Numerical analysis of flow field and heat transfer affected by Electrohydrodynamic actuator using micropolar model

In this work, the effect of emitter electrode arrangement on the Electrohydrodynamic effectiveness is studied using micropolar fluid model through a smooth channel. Finite volume method by the open source CFD code OpenFOAM is used to solve governing equations. The effects of longitudinal position and the gap between emitter electrode and collector electrode, as well as, longitudinal arrangements are investigated. The computed results of micropolar approach are compared with obtained from the fully turbulent k-ε model. The results of each type of the EHD flow with certain conditions show that the adequate material parameter(κ_ω⁄μ) is constant for the longitudinal electrode arrangements for single electrode and multiple electrodes because this parameter completely depends on the flow and the high magnitude of electric body force. Also, this parameter is increased with decrease of the gap between emitter electrode and collector electrode. In addition, the heat transfer enhancement and also the flow pattern has the same efficiency for both the micropolar and the k-ε models.