Numerous studies have been conducted to enhance the thermal performance of heat sinks. They have investigated heat sink configurations, flow patterns, design aspects, and the impact of cooling fluids, as well as various heat sink designs with respect to shape effects. This research examines the thermal and hydraulic performance of longitudinal flow-wise Wavy Fin Heat Sink (WFHS) design using Computational Fluid Dynamics (CFD). The validation of numerical study is conducted using the data of an experimental study, in which the main dimensions are kept constant. Wavy fin heat sinks are designed for different wavelengths and amplitudes. The effects of amplitude and wavelength on thermal and hydraulic performance are investigated using models that account for thermal resistance, pressure drop, and the base temperature of heat sinks. In addition, three-dimensional heat sink models are solved under turbulent flow conditions at two flow rates to assess the effect of flow rate on thermal performance and pressure drop. Heat transfer performance of wavy fins is also compared with that of rectangular fins (conventional design). Results revealed that even the wavy fin, with the highest thermal resistance, provides a 19% improvement as a reduction in thermal resistance compared to the conventional design, while its hydrodynamic performance decreases significantly. The increase in wavelength significantly improved hydrodynamic performance while reducing thermal performance at the specified amplitudes. By varying the wavelengths, thermal resistance is increased by 15.8% and 25.4% at a constant amplitude.
Gökhan Canbolat (Mon,) studied this question.