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A review on active techniques in microchannel heat sink for miniaturization problem in electronic industry

Bhandari Prabhakar, Singh Jarnail, Kumar Kaushal, Ranakoti Lalit

Acta Innovations

2022

no. 45

45--54

With continuous miniaturization of modern electronic components, the need of better cooling devices also keeps on increasing. The improper thermal management of these devices not only hampers the efficiency but can also cause permanent damage. Among various techniques, microchannel heat sink has shown most favourable performance. To further enhance the performance, two techniques i.e., active and passive are used. In passive technique, no external power source is required like heat sink design alteration and working fluid modification. External power source is necessary for heat transfer augmentation in the microchannel heat sink when using the active approach. Due to compact size of microchannel, active techniques are not used more often. However, the present work highlights the different active technique used in microchannel i.e., Electrostatic forces, flow pulsation, magnetic field, acoustic effects, and vibration active techniques. Above mentioned techniques have been analysed in detail.

Experimental Investigation of Pulsating Flows in Tubes of Periodically Variable Cross-section at Small Values of Womersley Number

Cieślicki K., Lasowska A.

Bulletin of the Polish Academy of Sciences. Earth Sciences

2001

Vol. 49, nr 2

109-121

The effects of flow pulsation in tubes of periodically variable boundaries were determined in an experimental programme where square and sinusoidal disturbances were applied. Instantaneous velocity field patterns were compared to field patterns in steady-state flow conditions at the corresponding values of Re.

Pulse Nebulization in Pneumatic Devices

Gradoń L., Sosnowski T. R., Podolec Z.

International Journal of Occupational Safety and Ergonomics

1999

Vol. 5, No. 1

31--42

Aerosols of a physiological salt solution and aqueous solutions of salbutamol, sodium cromoglicate, and dornase aifa were generated in a pneumatic nebulizer and analyzed in a system with controlled humidity of air as a carrier gas. Mass distribution of aerosol particles and yield of generation for pulse nebulization were measured. Pulsation of generation was realized with an attachment maintained by a computer program. Opening times of the valve were in the range 50-800 ms. The results indicate the possibility of improving aerosol particle delivery to the lung using a pulse generation system.