Browsing Mechanical, Manufacturing & Biomedical Eng by Author "Persoons, Tim"
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Electronics Thermal Management in Information and Communications Technologies: Challenges and Future Directions
Persoons, Tim (2017)This paper reviews thermal management challenges encountered in a wide range of electronics cooling applications from large-scale (data center and telecommunication) to small-scale systems (personal, portable/wearable, and ... -
An experimental investigation of natural convection from a staggered array of isothermal horizontal cylinders
Murray, Darina; Persoons, Tim (2013) -
Experimental study of flow dynamics in close-coupled catalyst manifolds
Persoons, Tim (2007)Time-resolved flow dynamics in an automotive exhaust manifold with close-coupled catalyst are investigated experimentally on a charged motored engine (CME) flow rig. Flow similarity between CME ... -
Flow visualisation and wake characterisation of a sliding bubble using particle image velocimetry
Murray, Darina; Persoons, Tim (2013) -
Foreword: Special Section on Data Center Cooling
Persoons, Tim (Institute of Electrical and Electronics Engineers (IEEE), 2017)Data centers account for a significant and growing fraction of the worldwide electricity demand, rising by an average of 11% per year from 2000 to a consumption of 27.1 GW in 2010, representing 1.3% of the total worldwide ... -
Heat Transfer Behaviour and Flow Field Characterisation of Impinging Synthetic Jets for a Wide Range of Parameters
Murray, Darina; Persoons, Tim (ASME, 2010)Impinging synthetic jets are considered as a potential solution for convective cooling, in applications that match their main characteristics (high local heat transfer rates, zero net mass flux, scalability, active control). ... -
Heat Transfer Enhancement In Ducts Due To Acoustic Excitation
Bennett, Gareth; Murray, Darina; Persoons, Tim (2009)The thermoacoustic effect that results from the interaction of a sound wave in a compressible fluid in contact with solid boundaries is known to be capable of removing heat from power dissipating systems. In this paper ... -
Heat transfer mechanisms in an impinging synthetic jet for a small jet-to-surface spacing
Murray, Darina; Persoons, Tim (2009)Impinging synthetic jets have been identified as a promising technique for cooling miniature surfaces like electronic packages. This study investigates the relation between the convective heat transfer characteristics and ... -
Heat transfer profiles of an impinging atomizing water-air mist jet
Murray, Darina; Persoons, Tim (2013) -
Localized and time-resolved measurements of pulsatile flow in a rectangular channel
Murray, Darina; Persoons, Tim (2016) -
Natural convection from a triangular array of isothermal horizontal cylinders
O'Shaughnessy, Seamus; Gibbons, Michael; Persoons, Tim; Murray, Darina (2021)Natural convection heat transfer from three isothermally heated horizontal cylinders submerged in water in a triangular arrangement is investigated. Two configurations, named here as one over two and two over one, are ... -
A Novel Linear Air Amplifier Technology to Replace Rotary Fans in Data Center Server Rack Cooling
Persoons, Tim; Alimohammadi, Sajad (2020)This paper investigates the potential of a novel linear airflow amplifier designed to replace rotary fans for various industries where their performance is undesirable like electronics cooling applications in compact data ... -
Numerical analysis of acoustic noise from an electronic cooling fan at flow disturbed by an external obstacle
Wasala, Sahan; Persoons, Tim; Sosseh, Raye; Stevens, Lon (internoise2022.org, 2022-08-24)Axial cooling fans are widely used in data center dense Hard Disk Drive (HDD) storage systems. However, these fans emit high noise levels and degrade HDD performance at certain frequencies. Flow at the fan's inlet can ... -
Reduced-order aeroacoustic modeling of electronics cooling fans
Zhao, Wenguang; Wasala, Sahan; Persoons, Tim (Society of Acoustics, Singapore, 2022)As the trend of compact packaging and high-density thermal management continues, the acoustic noise emission from electronics cooling fans is becoming a critical concern. High-fidelity computational fluid dynamics (CFD) ... -
A review of heat pipe technology for foldable electronic devices
Gibbons, Michael; Persoons, Tim (2021)The advent of foldable and wearable devices, such as the Samsung Galaxy Fold (2019) and Huawei Mate X (2019), require increased battery size and processor performance to drive their larger flexible displays. There is a ... -
Study of pulsating flow in close-coupled catalyst manifolds using phase-locked hot-wire anemometry
Persoons, Tim; Van Den Bulck, E.; Fausto, S. (2004)Phase-locked sampling has been applied to hot-wire anemometry in order to investigate the pulsating flow inside two types of automotive exhaust manifolds fitted with a close-coupled catalyst. An isothermal dynamic flow ... -
Time-resolved high-dynamic-range particle image velocimetry using local uncertainty estimation
Persoons, Tim (2015)The dynamic velocity range of particle image velocimetry is the ratio of the maximum to the minimum resolvable displacement. Although many techniques have been developed in recent years to extend the dynamic range, flows ... -
Towards Quieter Air-Cooling Systems: Rotor Self-Noise Prediction for Axial Cooling Fans
Persoons, Tim; Zhao, Wenguang; Wasala, Sahan (2022)Aeroacoustic noise is seen as a major threat to the survival of air cooling for electronics systems. The application of numerical noise prediction methods is highly constrained by computational costs. A reduced-order model ...