ABSTRACT This study develops a coupled multiphysics model for ion‐assisted electrohydrodynamic (EHD) cooling of a heavily heated metallic wall under severe thermal loading. The formulation integrates transient wall heat conduction, ionized‐air flow, electric‐potential distribution, charged‐species transport, and EHD body‐force generation within COMMENT‐Code. The model is used to examine whether a negative‐ion generator can enhance external convective cooling, suppress local hot spots, and reduce wall thermal gradients without altering the wall's structural role. The simulations predict that ion injection generates a nonuniform electric field and a localized space‐charge region that induces ionic wind and strengthens near‐wall momentum and heat transport. As a result, the thermal boundary layer is reduced and wall cooling is improved. The model predicts clear trends of reduced wall temperature, weaker hot‐spot intensity, improved thermal‐field uniformity, and enhanced effective heat‐transfer behavior under ion‐assisted operation. The cooling response increases with stronger electrical forcing, while the predicted rate of improvement becomes more gradual at higher operating levels. Overall, the results support the potential of ion‐assisted EHD cooling as an auxiliary thermal‐management strategy for severe heat‐load applications, while the reported performance trends should be interpreted as model‐supported engineering behavior rather than exact pointwise solver outputs.
Ismail et al. (Sun,) studied this question.
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