Dr Nicholas Williamson

Lecturer
School of Aerospace, Mechanical and Mechatronic Engineering

J07 - Mechanical Engineering Building
The University of Sydney

Telephone +61 2 9351 3098
Fax +61 2 9351 7060

Website School of Aerospace, Mechanical and Mechatronic Engineering

Fluid Dynamics Research Group (FLUD)

Teaching and supervision

AMME3060 - Engineering Methods
MECH3261 - Fluid Mechanics 2
MECH9261 - Fluid Mechanics 2

Current research students

Project title Research student
An investigation of conjugate natural convection boundary layers Layth AWIN
Entrainment in Pulsing Plumes Danlan HUANG
Direct numerical simulation for an unsteady natural convection boundary layer Kris KE
THE DETERMINATION OF WIND SHEAR EFFECTS ON THE DAY-TIME THERMALLY STRATIFFIED RIVERINE FLOW Hadi LASHKARBOLOUK
Entrainment and mixing in turbulent negatively buoyant jets and fountains Liam MILTON-MCGURK

Selected grants

2016

  • Entrainment and Mixing in Turbulent Negatively Buoyant Jets and Fountains; Armfield S, Williamson N, Lin W, Kirkpatrick M; Australian Research Council (ARC)/Discovery Projects (DP).

2015

  • Thermal stratification, overturning and mixing in riverine environments; Kirkpatrick M, Williamson N, Lin W, Armfield S; Australian Research Council (ARC)/Discovery Projects (DP).

2014

  • Direct Local Entrainment Measurements of Two Layer Stratified Shear Flows in River Bends; Williamson N; DVC Research/Bridging Support Fellowship.

2011

  • Purging and destratifying of thermal and saline pools in Australias inland rivers; Williamson N; Australian Research Council (ARC)/Discovery Projects (DP).

2010

  • Mixing in stratified channel flow; Williamson N; DVC Research/Bridging Support Grant.

Selected publications

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Journals

  • Williamson, N., Kirkpatrick, M., Armfield, S., Norris, S. (2016). Convectively unstable turbulent open channel flow with stable surface stratification. ANZIAM Journal, 56, C246-C261. [More Information]
  • Williamson, N., Armfield, S., Lin, W., Kirkpatrick, M. (2016). Stability and Nusselt number scaling for inclined differentially heated cavity flow. International Journal of Heat and Mass Transfer, 97, 787-793. [More Information]
  • Williamson, N., Armfield, S., Kirkpatrick, M., Lin, W. (2015). Bifurcation of natural convection flow in an inclined differentially heated closed square cavity. Computational Thermal Sciences, 7(5-6), 417-425. [More Information]
  • Williamson, N., Armfield, S., Kirkpatrick, M., Norris, S. (2015). Transition to stably stratified states in open channel flow with radiative surface heating. Journal of Fluid Mechanics, 766, 528-555. [More Information]
  • Williamson, N., Armfield, S., Kirkpatrick, M., Norris, S. (2013). A canonical model for stratified flow in estuaries and rivers. ANZIAM Journal, 54, C88-C101. [More Information]
  • Williamson, N., Norris, S., Armfield, S., Kirkpatrick, M. (2012). Lateral circulation in a stratified open channel on a 120 degree bend. Water Resources Research, 48(12), 1-11. [More Information]
  • Kirkpatrick, M., Armfield, S., Williamson, N. (2012). Shear driven purging of negatively buoyant fluid from trapezoidal depressions and cavities. Physics of Fluids, 24(2), 1-25. [More Information]
  • Williamson, N., Armfield, S., Kirkpatrick, M. (2012). Transition to oscillatory flow in a differentially heated cavity with a conducting partition. Journal of Fluid Mechanics, 693(25 February 2012), 93-114. [More Information]
  • Williamson, N., Armfield, S., Lin, W. (2011). Forced turbulent fountain flow behaviour. Journal of Fluid Mechanics, 671, 535-558. [More Information]
  • Williamson, N., Armfield, S. (2011). Stability characteristics of conjugate natural convection boundary layers. ANZIAM Journal, 52, C696-C709. [More Information]
  • Armfield, S., Williamson, N., Kirkpatrick, M., Street, R. (2010). A divergence free fractional-step method for the Navier-Stokes equations on non-staggered grids. ANZIAM Journal, 51, C654-C667.
  • Nagarathinam, S., Williamson, N., Armfield, S., Lin, W. (2010). Line fountain behavior at low-Reynolds number. International Journal of Heat and Mass Transfer, 53(9-10), 2065-2073. [More Information]
  • Williamson, N., Armfield, S., Lin, W. (2010). Transition behaviour of weak turbulent fountains. Journal of Fluid Mechanics, 655, 306-326. [More Information]
  • Williamson, N., Komiya, A., Maruyama, S., Behnia, M., Armfield, S. (2009). Nutrient Transport from an Artificial Upwelling of Deep Sea Water. Journal of Oceanography, 65(3), 349-359. [More Information]
  • Williamson, N., Behnia, M., Armfield, S. (2008). Comparison of a 2D axisymmetric CFD model of a natural draft wet cooling tower and a 1D model. International Journal of Heat and Mass Transfer, 51, 2227-2236. [More Information]
  • Williamson, N., Armfield, S., Lin, W. (2008). Direct numerical simulation of turbulent intermediate Froude number fountain flow. ANZIAM Journal, 50, C16-C30. [More Information]
  • Williamson, N., Nagarathinam, S., Armfield, S., McBain, G., Lin, W. (2008). Low-Reynolds-number fountain behaviour. Journal of Fluid Mechanics, 608, 297-317. [More Information]
  • Williamson, N., Armfield, S., Behnia, M. (2008). Numerical Simulation of Flow in a Natural Draft Wet Cooling Tower - the Effect of Radial Thermofluid Fields. Applied Thermal Engineering, 28(2-3), 178-189. [More Information]
  • Williamson, N., Behnia, M., Armfield, S. (2008). Thermal optimization of a natural draft wet cooling tower. International Journal of Energy Research, 32(14), 1349-1361. [More Information]
  • Williamson, N., Bansal, P. (2003). Feasibility of air cycle systems for low-temperature refrigeration applications with heat recovery. Institution of Mechanical Engineers. Proceedings. Part E, 217(3), 267-273. [More Information]

Conferences

  • Zhou, L., Armfield, S., Williamson, N., Kirkpatrick, M., Lin, W. (2016). Transient Natural Convection Flow in a Cavity Subject to Time-Varying Sidewall Heating and Cooling. 20th Australasian Fluid Mechanics Conference (AFMC 2016), Perth: Australasian Fluid Mechanics Society.
  • Williamson, N., Kirkpatrick, M., Armfield, S., Starner, S. (2014). Entrainment Across a Sharp Density Interface in a Sheared Cavity Flow. 19th Australasian Fluid Mechanics Conference, Melbourne: RMIT University.
  • Armfield, S., Kirkpatrick, M., Williamson, N., Lin, W. (2014). Natural Convection in an Inclined Differentially Heated Square Cavity. 15th International Heat Transfer Conference (IHTC 2014), Kyoto: Begell House Inc. [More Information]
  • Armfield, S., Williamson, N., Lin, W., Kirkpatrick, M. (2014). Nusselt Number Scaling in an Inclined Differentially Heated Square Cavity. 19th Australasian Fluid Mechanics Conference, Melbourne: RMIT University.
  • Kirkpatrick, M., Williamson, N., Starner, S., Armfield, S. (2014). Sheared Turbulent Convection of a Buoyant Fluid from a Horizontal Porous Plate. 19th Australasian Fluid Mechanics Conference, Melbourne: RMIT University.
  • Kirkpatrick, M., Starner, S., Williamson, N., Armfield, S. (2012). A New Experimental Rig for Investigations of Sheared Convective Boundary Layers. 18th Australasian Fluid Mechanics Conference AFMC 2012, Launceston, Tasmania: Australasian Fluid Mechanics Society.
  • Williamson, N., Norris, S., Armfield, S., Kirkpatrick, M. (2012). Secondary flow in stratified open channel flow on a bend. 18th Australasian Fluid Mechanics Conference AFMC 2012, Launceston, Tasmania: Australasian Fluid Mechanics Society.
  • Williamson, N., Armfield, S., Kirkpatrick, M. (2011). The stability of conjugate natural convection boundary layers on a conducting vertical partition in an open or closed rectangular cavity. 9th Australasian Heat and Mass Transfer Conference - 9AHMTC, Melbourne, Australia: Australasian Fluid and Thermal Engineering Society (AFTES).
  • Williamson, N., Armfield, S., Lin, W. (2010). Entrainment in turbulent fountain flow. 17th Australasian Fluid Mechanics Conference, Auckland, New Zealand: University of Auckland. [More Information]
  • Williamson, N., Armfield, S. (2010). The stability of conjugate natural convection boundary layers. 17th Australasian Fluid Mechanics Conference, Auckland, New Zealand: University of Auckland.
  • Komiya, A., Williamson, N., Nagarathinam, S., Behnia, M., Armfield, S., Maruyama, S. (2008). Visualization of Upwelled Saline Flow and its Transition Behaviour from Steady to Oscillatory regimes. The 19th International Symposium on Transport Phenomena (ISTP-19), Iceland: University of Iceland, Faculty of Industrial Engineering, Mechanical Engineering and Computer Science.
  • Williamson, N., Nagarathinam, S., Armfield, S., McBain, G., Lin, W. (2007). Characterisation of Low Reynolds Number Fountain Behaviour. 16th Australasian Fluid Mechanics Conference AFMC 2007, Australia: University of Queensland.
  • Williamson, N., Kirkpatrick, M., Armfield, S., Behnia, M. (2007). Sub-Filter Scale Models for Scalar Transport in Large Eddy Simulations. 16th Australasian Fluid Mechanics Conference AFMC 2007, Australia: University of Queensland.
  • Williamson, N., Armfield, S., Behnia, M. (2007). The Importance of Inlet Height to the Performance of a Natural Draft Wet Cooling Tower. 8th Australasian Heat and Mass Transfer Conference (8th AHMTC 2005), Redding, Connecticut, United States: Begell House Inc.
  • Williamson, N., Al-Waked, R., Behnia, M., Armfield, S. (2007). Thermal Performance of Natural Draft Cooling Towers. The Eighteenth International Symposium on Transport Phenomena (ISTP-18), Korea: Korean Society of Mechanical Engineers (KSME), Pacific Center of Thermal-Fluids Engineering (PCTFE).
  • Williamson, N., Behnia, M., Armfield, S. (2005). Numerical Simulation of Heat and Mass Transfer in a Natural Draft Wet Cooling Tower and Comparisons with Existing One-Dimensional Methods. 4th International Conference on Heat Transfer, Fluid Mechanics, and Thermodynamics : HEFAT 2005, Cairo, Egypt: Taylor and Francis.
  • Williamson, N., Behnia, M., Armfield, S. (2005). Optimal Annular Fill and Water Flow Rate Profile in a Natural Draft. Flow Dynamics: the Second International Conference on Flow Dynamics (AIP 2005), USA: American Institute of Physics (AIP).
  • Williamson, N., Behnia, M., Armfield, S. (2004). Numerical Simulation Of Heat And Mass Transfer In A Natural Draft Wet Cooling Tower. 15th Australasian Fluid Mechanics Conference AFMC 2004, Australia: University of Sydney. [More Information]
  • Williamson, N., Al-Waked, R., Behnia, M., Armfield, S. (2004). Simulation Of Heat And Mass Transfer Inside Natural Draft Wet Cooling Towers Under Cross-Wind Conditions. 3rd International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT 2004), Philadelphia: Taylor and Francis.

2016

  • Williamson, N., Kirkpatrick, M., Armfield, S., Norris, S. (2016). Convectively unstable turbulent open channel flow with stable surface stratification. ANZIAM Journal, 56, C246-C261. [More Information]
  • Williamson, N., Armfield, S., Lin, W., Kirkpatrick, M. (2016). Stability and Nusselt number scaling for inclined differentially heated cavity flow. International Journal of Heat and Mass Transfer, 97, 787-793. [More Information]
  • Zhou, L., Armfield, S., Williamson, N., Kirkpatrick, M., Lin, W. (2016). Transient Natural Convection Flow in a Cavity Subject to Time-Varying Sidewall Heating and Cooling. 20th Australasian Fluid Mechanics Conference (AFMC 2016), Perth: Australasian Fluid Mechanics Society.

2015

  • Williamson, N., Armfield, S., Kirkpatrick, M., Lin, W. (2015). Bifurcation of natural convection flow in an inclined differentially heated closed square cavity. Computational Thermal Sciences, 7(5-6), 417-425. [More Information]
  • Williamson, N., Armfield, S., Kirkpatrick, M., Norris, S. (2015). Transition to stably stratified states in open channel flow with radiative surface heating. Journal of Fluid Mechanics, 766, 528-555. [More Information]

2014

  • Williamson, N., Kirkpatrick, M., Armfield, S., Starner, S. (2014). Entrainment Across a Sharp Density Interface in a Sheared Cavity Flow. 19th Australasian Fluid Mechanics Conference, Melbourne: RMIT University.
  • Armfield, S., Kirkpatrick, M., Williamson, N., Lin, W. (2014). Natural Convection in an Inclined Differentially Heated Square Cavity. 15th International Heat Transfer Conference (IHTC 2014), Kyoto: Begell House Inc. [More Information]
  • Armfield, S., Williamson, N., Lin, W., Kirkpatrick, M. (2014). Nusselt Number Scaling in an Inclined Differentially Heated Square Cavity. 19th Australasian Fluid Mechanics Conference, Melbourne: RMIT University.
  • Kirkpatrick, M., Williamson, N., Starner, S., Armfield, S. (2014). Sheared Turbulent Convection of a Buoyant Fluid from a Horizontal Porous Plate. 19th Australasian Fluid Mechanics Conference, Melbourne: RMIT University.

2013

  • Williamson, N., Armfield, S., Kirkpatrick, M., Norris, S. (2013). A canonical model for stratified flow in estuaries and rivers. ANZIAM Journal, 54, C88-C101. [More Information]

2012

  • Kirkpatrick, M., Starner, S., Williamson, N., Armfield, S. (2012). A New Experimental Rig for Investigations of Sheared Convective Boundary Layers. 18th Australasian Fluid Mechanics Conference AFMC 2012, Launceston, Tasmania: Australasian Fluid Mechanics Society.
  • Williamson, N., Norris, S., Armfield, S., Kirkpatrick, M. (2012). Lateral circulation in a stratified open channel on a 120 degree bend. Water Resources Research, 48(12), 1-11. [More Information]
  • Williamson, N., Norris, S., Armfield, S., Kirkpatrick, M. (2012). Secondary flow in stratified open channel flow on a bend. 18th Australasian Fluid Mechanics Conference AFMC 2012, Launceston, Tasmania: Australasian Fluid Mechanics Society.
  • Kirkpatrick, M., Armfield, S., Williamson, N. (2012). Shear driven purging of negatively buoyant fluid from trapezoidal depressions and cavities. Physics of Fluids, 24(2), 1-25. [More Information]
  • Williamson, N., Armfield, S., Kirkpatrick, M. (2012). Transition to oscillatory flow in a differentially heated cavity with a conducting partition. Journal of Fluid Mechanics, 693(25 February 2012), 93-114. [More Information]

2011

  • Williamson, N., Armfield, S., Lin, W. (2011). Forced turbulent fountain flow behaviour. Journal of Fluid Mechanics, 671, 535-558. [More Information]
  • Williamson, N., Armfield, S. (2011). Stability characteristics of conjugate natural convection boundary layers. ANZIAM Journal, 52, C696-C709. [More Information]
  • Williamson, N., Armfield, S., Kirkpatrick, M. (2011). The stability of conjugate natural convection boundary layers on a conducting vertical partition in an open or closed rectangular cavity. 9th Australasian Heat and Mass Transfer Conference - 9AHMTC, Melbourne, Australia: Australasian Fluid and Thermal Engineering Society (AFTES).

2010

  • Armfield, S., Williamson, N., Kirkpatrick, M., Street, R. (2010). A divergence free fractional-step method for the Navier-Stokes equations on non-staggered grids. ANZIAM Journal, 51, C654-C667.
  • Williamson, N., Armfield, S., Lin, W. (2010). Entrainment in turbulent fountain flow. 17th Australasian Fluid Mechanics Conference, Auckland, New Zealand: University of Auckland. [More Information]
  • Nagarathinam, S., Williamson, N., Armfield, S., Lin, W. (2010). Line fountain behavior at low-Reynolds number. International Journal of Heat and Mass Transfer, 53(9-10), 2065-2073. [More Information]
  • Williamson, N., Armfield, S. (2010). The stability of conjugate natural convection boundary layers. 17th Australasian Fluid Mechanics Conference, Auckland, New Zealand: University of Auckland.
  • Williamson, N., Armfield, S., Lin, W. (2010). Transition behaviour of weak turbulent fountains. Journal of Fluid Mechanics, 655, 306-326. [More Information]

2009

  • Williamson, N., Komiya, A., Maruyama, S., Behnia, M., Armfield, S. (2009). Nutrient Transport from an Artificial Upwelling of Deep Sea Water. Journal of Oceanography, 65(3), 349-359. [More Information]

2008

  • Williamson, N., Behnia, M., Armfield, S. (2008). Comparison of a 2D axisymmetric CFD model of a natural draft wet cooling tower and a 1D model. International Journal of Heat and Mass Transfer, 51, 2227-2236. [More Information]
  • Williamson, N., Armfield, S., Lin, W. (2008). Direct numerical simulation of turbulent intermediate Froude number fountain flow. ANZIAM Journal, 50, C16-C30. [More Information]
  • Williamson, N., Nagarathinam, S., Armfield, S., McBain, G., Lin, W. (2008). Low-Reynolds-number fountain behaviour. Journal of Fluid Mechanics, 608, 297-317. [More Information]
  • Williamson, N., Armfield, S., Behnia, M. (2008). Numerical Simulation of Flow in a Natural Draft Wet Cooling Tower - the Effect of Radial Thermofluid Fields. Applied Thermal Engineering, 28(2-3), 178-189. [More Information]
  • Williamson, N., Behnia, M., Armfield, S. (2008). Thermal optimization of a natural draft wet cooling tower. International Journal of Energy Research, 32(14), 1349-1361. [More Information]
  • Komiya, A., Williamson, N., Nagarathinam, S., Behnia, M., Armfield, S., Maruyama, S. (2008). Visualization of Upwelled Saline Flow and its Transition Behaviour from Steady to Oscillatory regimes. The 19th International Symposium on Transport Phenomena (ISTP-19), Iceland: University of Iceland, Faculty of Industrial Engineering, Mechanical Engineering and Computer Science.

2007

  • Williamson, N., Nagarathinam, S., Armfield, S., McBain, G., Lin, W. (2007). Characterisation of Low Reynolds Number Fountain Behaviour. 16th Australasian Fluid Mechanics Conference AFMC 2007, Australia: University of Queensland.
  • Williamson, N., Kirkpatrick, M., Armfield, S., Behnia, M. (2007). Sub-Filter Scale Models for Scalar Transport in Large Eddy Simulations. 16th Australasian Fluid Mechanics Conference AFMC 2007, Australia: University of Queensland.
  • Williamson, N., Armfield, S., Behnia, M. (2007). The Importance of Inlet Height to the Performance of a Natural Draft Wet Cooling Tower. 8th Australasian Heat and Mass Transfer Conference (8th AHMTC 2005), Redding, Connecticut, United States: Begell House Inc.
  • Williamson, N., Al-Waked, R., Behnia, M., Armfield, S. (2007). Thermal Performance of Natural Draft Cooling Towers. The Eighteenth International Symposium on Transport Phenomena (ISTP-18), Korea: Korean Society of Mechanical Engineers (KSME), Pacific Center of Thermal-Fluids Engineering (PCTFE).

2005

  • Williamson, N., Behnia, M., Armfield, S. (2005). Numerical Simulation of Heat and Mass Transfer in a Natural Draft Wet Cooling Tower and Comparisons with Existing One-Dimensional Methods. 4th International Conference on Heat Transfer, Fluid Mechanics, and Thermodynamics : HEFAT 2005, Cairo, Egypt: Taylor and Francis.
  • Williamson, N., Behnia, M., Armfield, S. (2005). Optimal Annular Fill and Water Flow Rate Profile in a Natural Draft. Flow Dynamics: the Second International Conference on Flow Dynamics (AIP 2005), USA: American Institute of Physics (AIP).

2004

  • Williamson, N., Behnia, M., Armfield, S. (2004). Numerical Simulation Of Heat And Mass Transfer In A Natural Draft Wet Cooling Tower. 15th Australasian Fluid Mechanics Conference AFMC 2004, Australia: University of Sydney. [More Information]
  • Williamson, N., Al-Waked, R., Behnia, M., Armfield, S. (2004). Simulation Of Heat And Mass Transfer Inside Natural Draft Wet Cooling Towers Under Cross-Wind Conditions. 3rd International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT 2004), Philadelphia: Taylor and Francis.

2003

  • Williamson, N., Bansal, P. (2003). Feasibility of air cycle systems for low-temperature refrigeration applications with heat recovery. Institution of Mechanical Engineers. Proceedings. Part E, 217(3), 267-273. [More Information]

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