Outputs (22)

Experimental and Analytical Investigation on the Evaporation Characteristics of Single and Binary Component Droplets in a Hot Air Stream (2025)
Journal Article
Omar, R. A., Planas Zanutto, C., Ambrose, S., Hann, D., & Eastwick, C. (2025). Experimental and Analytical Investigation on the Evaporation Characteristics of Single and Binary Component Droplets in a Hot Air Stream. Applied Thermal Engineering, 278(Part B), Article 126993. https://doi.org/10.1016/j.applthermaleng.2025.126993

Although several simplified models for bi-component droplet evaporation have been proposed in the literature, direct validation against experimental data remains scarce, particularly under forced convection conditions. This study presents a combined... Read More about Experimental and Analytical Investigation on the Evaporation Characteristics of Single and Binary Component Droplets in a Hot Air Stream.

Slug frequency for a gas-liquid viscous flow in vertical pipes (2024)
Presentation / Conference Contribution
Magit, K., Hann, D., Hewkandamby, B., & Kisha, W. (2024, August). Slug frequency for a gas-liquid viscous flow in vertical pipes. Paper presented at 10th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics, Rhodes Island, Greece

Slug frequency is an important parameter for designing industrial installations with intermittent gas-liquid flows. The literature contains several empirical correlations to predict this parameter, but most studies have focused on air and water, with... Read More about Slug frequency for a gas-liquid viscous flow in vertical pipes.

Characterising Horizontal Two-Phase Flows Using Structured-Planar Laser-Induced Fluorescence (S-PLIF) Coupled With Simultaneous Two-Phase PIV (S2P-PIV) (2024)
Presentation / Conference Contribution
Sherif, A. A., Hann, D. B., & Johnson, K. (2024, July). Characterising Horizontal Two-Phase Flows Using Structured-Planar Laser-Induced Fluorescence (S-PLIF) Coupled With Simultaneous Two-Phase PIV (S2P-PIV). Presented at 21st International Symposium on Applications of Laser and Imaging Techniques to Fluid Mechanics, Lisbon, Portugal

Understanding the physics that underpins the behaviors of two-phase flows is immensely useful for a diverse number of industries, including oil and gas, nuclear, and aerospace. Stratified air-liquid two-phase flows are amenable to the application of two... Read More about Characterising Horizontal Two-Phase Flows Using Structured-Planar Laser-Induced Fluorescence (S-PLIF) Coupled With Simultaneous Two-Phase PIV (S2P-PIV).

Experimental investigation into oil film thickness and behaviour near an aero-engine bearing (2022)
Presentation / Conference Contribution
Sinha, A., Hann, D., Johnson, K., & Walsh, M. (2022, June). Experimental investigation into oil film thickness and behaviour near an aero-engine bearing. Presented at ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, Rotterdam, Netherlands

In an aero-engine transmission system, bearings are used for shaft location and load support. These bearings are housed in bearing chambers and oil is supplied to the chamber for lubrication and cooling. To achieve the targets of ACARE Flightpath 205... Read More about Experimental investigation into oil film thickness and behaviour near an aero-engine bearing.

How Do Interfacial Shear and Gravity Affect the Oil Film Characteristics Near an Aero-Engine Bearing? (2022)
Journal Article
Sinha, A., Brewster, B., Johnson, K., Walsh, M., & Hann, D. (2022). How Do Interfacial Shear and Gravity Affect the Oil Film Characteristics Near an Aero-Engine Bearing?. Journal of Engineering for Gas Turbines and Power, 144(10), Article 101001. https://doi.org/10.1115/1.4055211

Recent demand for reducing carbon emission and for increasing engine efficiency has led aero-engine manufacturers to strive for a better oil flow system. Aero-engine bearing chambers that house the shaft-support bearings are among the most challengin... Read More about How Do Interfacial Shear and Gravity Affect the Oil Film Characteristics Near an Aero-Engine Bearing?.

Can simultaneous PIV in the gas and liquid phases provide insight into the transfer of momentum between the two phases? (2022)
Presentation / Conference Contribution
Kim, J. H., Hann, D. B., Eastwick, C. M., & Cherdantsev, A. V. (2022, July). Can simultaneous PIV in the gas and liquid phases provide insight into the transfer of momentum between the two phases?. Presented at 20th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics, Lisbon, Portugal

Understanding the interaction between a gas shearing over a liquid film and the liquid film is essential if we wish to use modeling to optimize systems to decrease environmental impact, increase efficiency and hence productivity. To this end, PIV is... Read More about Can simultaneous PIV in the gas and liquid phases provide insight into the transfer of momentum between the two phases?.

Experimental Investigation Into Oil Film Thickness and Behaviour Near an Aero-Engine Bearing (2022)
Presentation / Conference Contribution
Sinha, A., Hann, D., Johnson, K., & Walsh, M. (2022, June). Experimental Investigation Into Oil Film Thickness and Behaviour Near an Aero-Engine Bearing. Presented at ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, Rotterdam, Netherlands

In an aero-engine transmission system, bearings are used for shaft location and load support. These bearings are housed in bearing chambers and oil is supplied to the chamber for lubrication and cooling. To achieve the targets of ACARE Flight-path 20... Read More about Experimental Investigation Into Oil Film Thickness and Behaviour Near an Aero-Engine Bearing.

Studying the impacts of droplets depositing from the gas core onto a gas-sheared liquid film with stereoscopic BBLIF technique. (2022)
Journal Article
Cherdantsev, A. V., Sinha, A., & Hann, D. B. (2022). Studying the impacts of droplets depositing from the gas core onto a gas-sheared liquid film with stereoscopic BBLIF technique. International Journal of Multiphase Flow, 150, Article 104033. https://doi.org/10.1016/j.ijmultiphaseflow.2022.104033

In annular gas-liquid flow, the droplets are torn from the liquid film surface by the turbulent gas stream, accelerate due to the gas drag force and eventually deposit back onto the wavy film surface, hitting it with a high speed at a shallow angle.... Read More about Studying the impacts of droplets depositing from the gas core onto a gas-sheared liquid film with stereoscopic BBLIF technique..

How do the liquid properties affect the entrapment of bubbles in gas sheared liquid flows? (2021)
Journal Article
Sinha, A., Cherdantsev, A., Johnson, K., Vasques, J., & Hann, D. (2021). How do the liquid properties affect the entrapment of bubbles in gas sheared liquid flows?. International Journal of Heat and Fluid Flow, 92, Article 108878. https://doi.org/10.1016/j.ijheatfluidflow.2021.108878

A large number of industries use fossil fuels for the purpose of cooling and lubrication utilizing a gas stream that acts as a shearing force on the liquid surface. Decreasing the carbon footprint of these processes needs an improved understanding of... Read More about How do the liquid properties affect the entrapment of bubbles in gas sheared liquid flows?.

Asymmetrically heated multi-stage travelling-wave thermoacoustic electricity generator (2021)
Journal Article
Kisha, W., Riley, P., McKechnie, J., & Hann, D. (2021). Asymmetrically heated multi-stage travelling-wave thermoacoustic electricity generator. Energy, 235, Article 121312. https://doi.org/10.1016/j.energy.2021.121312

Recent developments of thermoacoustic engines have demonstrated that thermoacoustic technology is a viable option for waste heat recovery and low-cost electricity generation, Thermoacoustic technology is capable of converting low-grade heat to electr... Read More about Asymmetrically heated multi-stage travelling-wave thermoacoustic electricity generator.