Information from the abstract
This study experimentally investigates electrohydrodynamic (EHD)-enhanced heat transfer in a vertical air channel. The scientific novelty of this study lies in the combined application of TLC thermography and smoke visualization to systematically correlate EHD-induced flow structures, vortex formation, and localized heat transfer enhancement under different electrode configurations and spacings. The experiments were conducted at a constant heat input of 2 W, and voltages ranging from 2500 to 10,000 V using single ( E = 1) and dual ( E = 2) electrode configurations with varying electrode spacing ( L = 1.0–3.0 cm). This study provides detailed spatial characterization of thermal boundary layer modification. Flow visualization reveals that the application of an electric field generates ionic wind that significantly enhances flow mixing and alters the flow structure. TLC measurements demonstrate that EHD forcing leads to substantial modification of the thermal boundary layer, producing localized regions of enhanced heat transfer near the electrodes. Increasing the applied voltage expands both the intensity and spatial extent of these regions. Quantitative analysis of local and area-averaged Nusselt numbers shows that heat transfer enhancement strongly depends on electrode configuration and spacing. Dual-electrode configurations outperform single-electrode systems, with the optimal performance achieved at L = 3.0 cm. The maximum area-averaged Nusselt number increases by up to 47% compared to the baseline case. The results also indicate that electrode spacing governs the balance between enhancement intensity and spatial coverage by modulating electric field interaction. These findings provide new physical insights into EHD-driven thermal transport mechanisms and offer practical design guidelines for compact and energy-efficient thermal management systems.
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This record has an Impact Signal of 73/100 based on recency, source, collaboration, and bibliographic signals. It prioritizes monitoring and is not a judgment of research quality.
Related topics: Electrohydrodynamics and Fluid Dynamics · Fluid Dynamics and Heat Transfer · Power Transformer Diagnostics and Insulation
Thai researcher and institutional participation
K. Wongcharee · D. Chutrakul · V. Chuwattanakul · S. Eiamsa-ard · Mahanakorn University of Technology · King Mongkut's Institute of Technology Ladkrabang
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