Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 53 3 2021 05 22 Numerical Analysis of Secondary Flow Strength Induced by Electrohydrodynamic Actuator Through a Smooth Channel Numerical Analysis of Secondary Flow Strength Induced by Electrohydrodynamic Actuator Through a Smooth Channel 1401 1416 3736 10.22060/mej.2019.16765.6435 FA Hesam Moayedi Thermo-Fluids Department, Faculty of Mechanical Engineering, University of Guilan, Iran Nima Amani Fard Hamed Mohaddes Deylami University of guilan 0000-0003-1125-2134 Journal Article 2019 07 15 In this paper, the effect of the secondary flow induced by the electrohydrodynamic actuator is numerically investigated in the vorticity flux, as a criterion for the secondary flow strength, and the electrohydrodynamic vortices through a smooth channel. In this study, the influence of effectiveness parameters of the electrohydrodynamic as the Reynolds number, applied voltage and the arrangement of the emitting electrode on the vorticity flux, and also relationship between flow and heat transfer characteristics with the vorticity flux are evaluated. The results indicated that in presence of electric field, by increasing the Reynolds number, dimension of the upstream electrohydrodynamic-induced vortices and the vorticity flux are decreased. Also, it is obvious that by increasing the applied voltage, the dimension of the electrohydrodynamic-induced vortices and the vorticity flux are increased. According to numerical results, the heat transfer enhancement is completely depending on the vorticity flux. Also, by changing of the emitter arrangements, the non-dimension average vorticity flux and the average heat transfer enhancement are changed. It is shown that with decrease of the distance between emitter electrode and inlet of channel, the non-dimension average vorticity flux and the average heat transfer enhancement are increased 27.9% and 17.9%, respectively. In this paper, the effect of the secondary flow induced by the electrohydrodynamic actuator is numerically investigated in the vorticity flux, as a criterion for the secondary flow strength, and the electrohydrodynamic vortices through a smooth channel. In this study, the influence of effectiveness parameters of the electrohydrodynamic as the Reynolds number, applied voltage and the arrangement of the emitting electrode on the vorticity flux, and also relationship between flow and heat transfer characteristics with the vorticity flux are evaluated. The results indicated that in presence of electric field, by increasing the Reynolds number, dimension of the upstream electrohydrodynamic-induced vortices and the vorticity flux are decreased. Also, it is obvious that by increasing the applied voltage, the dimension of the electrohydrodynamic-induced vortices and the vorticity flux are increased. According to numerical results, the heat transfer enhancement is completely depending on the vorticity flux. Also, by changing of the emitter arrangements, the non-dimension average vorticity flux and the average heat transfer enhancement are changed. It is shown that with decrease of the distance between emitter electrode and inlet of channel, the non-dimension average vorticity flux and the average heat transfer enhancement are increased 27.9% and 17.9%, respectively. https://mej.aut.ac.ir/article_3736_3e195b0793297114c668f772c6e2d9ba.pdf