Browsing by Author "MURRAY, DARINA"
Now showing items 1-20 of 40
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Bubble Impingement and the Mechanisms of Heat Transfer
ROBINSON, ANTHONY; ALBADAWI, ABDULALEEM; MURRAY, DARINA (2014)Heat transfer augmentation resulting from the effects of two phase flow can play a significant role in convective cooling applications. To date, the interaction between a rising gas bubble impinging on a heated horizontal ... -
A Comparison between steady jets and synthetic jets at low Reynolds numbers
PERSOONS, TIM; MURRAY, DARINA (ASME, 2008) -
The effect of the VOF-CSF static contact angle boundary condition on the dynamics of sliding and bouncing elliposidal bubbles.
MURRAY, DARINA (2011)The staticcontactangle is the only empiricism introduced in a Volume of Fluid?Continuum Surface Force (VOF?CSF) model of bubbly flow. Although it has previously been shown to have a relatively limited effect on the accuracy ... -
Examination of the Local and Fluctuating Heat Transfer due to Swirling Jets Impinging upon a Heated Horizontal Surface
MURRAY, DARINA (2011)In the area of heat dissipation, impinging jets have been researched over many years and are a well defined method of attaining high heat transfer coefficients. Many different techniques have been looked at over past years ... -
Experimental Validation of a Computational Fluid Dynamics Methodology for Transitional Flow Heat Transfer Characteristics of a Steady Impinging Jet
PERSOONS, TIM; MURRAY, DARINA (2014)This paper presents a computational fluid dynamics (CFD) methodology to accurately predict the heat transfer characteristics of an unconfined steady impinging air jet in the transitional flow regime, impinging on a planar ... -
Flow regime characterisation of an impinging axisymmetric synthetic jet
MURRAY, DARINA; PERSOONS, TIM (2013)Impinging synthetic jets have excellent potential for energy-efficient local cooling in confined geometries. For a given geometry, synthetic jet flows are mainly characterised by the Reynolds number and the ratio of stroke ... -
Fluctuating and time averaged heat transfer characteristics of a steady jet at low Reynolds numbers
PERSOONS, TIM; MURRAY, DARINA (2009) -
Fluctuating fluid flow and heat transfer of an obliquely impinging air jet
MURRAY, DARINA (2008)Heat transfer to an obliquely impinging air jet is investigated experimentally. Distributions of the mean and the fluctuating component of the surface heat transfer are reported for a jet Reynolds number of 10,000, nozzle ... -
Forced convection in the wakes of sliding bubbles
MURRAY, DARINA; PERSOONS, TIM (2016)Both vapour and gas bubbles are known to significantly increase heat transfer rates between a heated surface and the surrounding fluid, even with no phase change. However, the complex wake structures means that the surface ... -
A general correlation for the stagnation point Nusselt number of an axisymmetric impinging synthetic jet
MURRAY, DARINA; PERSOONS, TIM (2011)Whereas the heat transfer mechanisms in steady impinging jets are well understood, the available knowledge of heat transfer to impinging synthetic jets remains inconsistent. This paper provides an objective comparison of ... -
Heat transfer and air temperature measurements of an impinging synthetic air jet
MURRAY, DARINA; PERSOONS, TIM (2009)Synthetic jets are a relatively new technology that can achieve high rates of heat transfer. They have been shown to out-perform comparable steady impinging jets without the need for an external air supply system. The ... -
Heat transfer and flow characteristics of a pair of adjacent synthetic jets
MURRAY, DARINA (2013) -
Heat transfer and flow structure evaluation of a synthetic jet emanating from a planar heat sink
MURRAY, DARINA; PERSOONS, TIM (2014)Direct impinging synthetic jets are a proven method for heat transfer enhancement, and have been subject to extensive research. However, despite the vast amount of research into direct synthetic jet impingement, there ... -
Heat transfer behaviour of a dilute impinging air-water mist jet at low wall temperatures
MURRAY, DARINA; PERSOONS, TIM (2017) -
Heat Transfer Characteristics of Swirling Impinging Jets
MURRAY, DARINA (ASME, 2010) -
Heat Transfer Enhancement from Bouncing Bubble Dynamics
ROBINSON, ANTHONY; MURRAY, DARINA; DONOGHUE, DAVID BRENDAN (2011)Heat transfer enhancement resulting from the effects of two phase flow can play an important role in for convective cooling. Currently, the effect of bubble/surface interactions has received very little attention. To address ... -
Heat transfer in adjacent interacting impinging synthetic jets
MURRAY, DARINA; PERSOONS, TIM (ASME, 2009)An impinging synthetic jet can attain heat transfer rates comparable to a continuous jet, without net mass input. However it needs a forced cross-flow to supply fresh cooling medium. The vectoring effect of adjacent synthetic ... -
Heat transfer to an obliquely impinging air jet
O'DONOVAN, TADHG; TORRANCE, ARCHIBALD; MURRAY, DARINA (2003)