Document Type
Conference Paper
Abstract
The miniaturization of electronic packages and their associated high-power density circuits requires more innovative cooling solutions. Single phase pulsating flows offer a promising solution due to their disruption of the thermal boundary layer. This study aims to bridge the knowledge gap by using experimental and computational methods to investigate the complex flow characteristics of laminar pulsating flows in a heated rectangular minichannel and couple that analysis with an investigation of thermal-hydraulic performance. Experimental analysis involves a uniformly heated thin foil approximating a constant heat flux bottom wall. Wall temperature measurements are recorded using an infrared thermography system. Analogous to the experimental conditions, a three-dimensional conjugate heat transfer computational model is developed with a volumetric heat generation source. Positive and negative half rectified sinusoidal pulsating flow waveforms are studied for dimensionless pulsation frequencies or Womersley numbers of Wo = 2.5 and 5.1 at a fixed flow rate amplitude A 0 = 3. For the positive half rectified waveform, a marginal enhancement in heat transfer of 2.2% for Wo = 2.5, A 0 = 3 was obtained. Whereas the negative half rectified case leads to a heat transfer enhancement of 9% and 6% for Wo = 2.5 and Wo = 5.1 respectively, with a high thermal performance of • = 2.4 over corresponding steady flow.
DOI
10.1088/1742-6596/2766/1/012180
Recommended Citation
Kumavat, P. S., Alimohammadi, S., & O'Shaughnessy, S. M. (2024). A combined experimental and numerical approach for heat transfer enhancement in a minichannel using half rectified pulsating flows. Journal of Physics: Conference Series, 2766(1), Article 012180. https://doi.org/10.1088/1742-6596/2766/1/012180
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Publication Details
https://doi.org/10.1088/1742-6596/2766/1/012180