Picture of Nick Jeffers

Nick Jeffers

Dublin, Ireland
Senior Member of Technical Staff

Education

2009-2011 Trinity College Dublin, Ireland

Post Doctoral Researcher

Title: In Package Micro Refrigeration Photonics Cooling

2006-2009 University of Limerick, Ireland

PhD in Heat Transfer and Fluid Mechanics

Title: On the Heat Transfer and Fluid Mechanics of a Normally-Impinging, Submerged and Confined Liquid Jet 

2002-2006 Trinity College Dublin, Ireland

BA. BAI. (Hons. 1st) Mechanical and Manufacturing Engineering

Dissertation Project: Fabrication and testing of a closed two-phased thermosyphon

Biography

Nick Jeffers is a Senior Member of Technical Staff at Nokia Bell Labs. He received a degree in Mechanical Engineering from Trinity College Dublin, Ireland in 2006, and subsequently achieved his PhD from the University of Limerick, Ireland in 2009 in the area of submerged liquid jets for enhanced electronics cooling. He was awarded a post-doctoral research fellowship to continue his research in fluid mechanics and heat transfer at Trinity College Dublin. Nick joined Nokia Bell Labs in 2011 as a Member of Technical Staff and was promoted to Senior Member of Technical Staff in 2014. He has wide-ranging research interests in the analysis of macro and micro scale mechanical engineering phenomena with particular emphasis on thermal/energy management. Currently he leads multiple high impact projects that he hopes will solve future human challenges. Nick collaborates extensively in the local ecosystem and has supervised 4 completed PhDs and currently supervises 2 PhDs and 2 Post Docs. He has authored and co-authored 16 journal publications, 3 granted patent, 23 patents pending, and 22 peer reviewed conference publications. His work has been recognized by numerous awards and prizes throughout his career.

Research Interests

  • Biological Communications
  • IoT/M2M
  • Materials Science
  • Nanotechnology
  • Optical Devices
  • Robotics
  • Thermal Design
  • Wireless Communications

Honors and Awards

Nokia applaud excellence award 2017

Nokia applaud excellence award 2016

Award medal from Societé Hydrotechnique De France for contributions to micro fluidics

Alcatel-Lucent award of excellence 2013

Alcatel-Lucent UK&I recognition award 2012

Bell Labs outstanding achievement award 2011

Awarded the Institute of Mechanical Engineers (IMechE) final year project prize

Awarded the Trinity College Dublin Mechanical Engineering departmental final year project prize

Selected Articles and Publications

1. Jeffers, N., Punch, J., Walsh, E., & McLean, M. (2009). Heat transfer from novel target surface structures to a normally impinging, submerged and confined water jet. Journal of Thermal Science and Engineering Applications, 1(3), 31001.

2. Jeffers, N., Punch, J., & Walsh, E. (2010). Temperature distribution on an isoflux surface cooled by an impinging liquid jet with a 40° Wall Jet Swirl Generator. Journal of Visualization, 13(3), 177–178.

3.  Jeffers, N., Punch, J., Walsh, E. J., & McLean, M. (2010). Heat transfer from novel target surface structures to a 3x3 array of normally impinging water jets. Journal of Thermal Science and Engineering Applications, 2(4), 41004.

4. Jeffers, N., Stafford, J., Conway, C., Punch, J., & Walsh, E. (2016). The influence of the stagnation zone on the fluid dynamics at the nozzle exit of a confined and submerged impinging jet. Experiments in Fluids, 57(2), 17.

5. Waddell, A. M., Punch, J., Stafford, J., & Jeffers, N. (2016). The characterization of a low-profile channel–confined jet for targeted hot-spot cooling in microfluidic applications. International Journal of Heat and Mass Transfer, 101, 620–628.

6. Waddell, A. M., Punch, J., Stafford, J., & Jeffers, N. (2015). On the hydrodynamic characterization of a passive Shape Memory Alloy valve. Applied Thermal Engineering, 75, 731–737.

7. Waddell, A. M., Punch, J., Stafford, J., & Jeffers, N. (2016). A visualization of the flow and heat transfer from an oblique impinging jet generated in a square miniature channel. Journal of Visualization, 19(1), 11–14.

8. Waddell, A. M., Punch, J., Stafford, J., & Jeffers, N. (2016). The hydrodynamic and heat transfer behavior downstream of a channel obstruction in the laminar flow regime. International Journal of Heat and Mass Transfer, 101, 1042–1052.

9. Stafford, J., & Jeffers, N. (2017). Aerodynamic Performance of a Vibrating Piezoelectric Blade Under Varied Operational and Confinement States. IEEE Transactions on Components, Packaging and Manufacturing Technology, 7(5), 751–761.

10. Sexton, A., Punch, J., Jeffers, N. and Stafford, J., “Passive Control and Enhancement of Low Reynolds Number Slot Jets Through the use of Tabs and Chevrons”, Journal of Heat Transfer, 140(3), 032201

11.  Sexton, A., Punch, J., Jeffers, N. and Stafford, J., “The Thermal and Hydrodynamic Behaviour of Confined, Normally Impinging Laminar Slot Jets”, International Journal of Heat and Mass Transfer. In Press

12. Shiel, P., Jeffers, N., Dyar, M. (2011). Energy Conservation Measures in Japan. Trinity College Dublin.

13. O’Connor, J., Punch, J., Jeffers, N., & Stafford, J. (2015). A comparison between the hydrodynamic characteristics of 3D-printed polymer and etched silicon microchannels. Microfluidics and Nanofluidics, 19(2), 385–394.

14. Agarwal, A., Nolan, K. P., Stafford, J., & Jeffers, N. (2017). Visualization of three-dimensional structures shed by an oscillating beam. Journal of Fluids and Structures, 70, 450–463.

15. Blythman, R., Alimohammadi, S., Persoons, T., Jeffers, N., & Murray, D. B. (2017). Parametric analysis of laminar pulsating flow in a rectangular channel. Heat and Mass Transfer, 1–10.

16.  Blythman, R., Persoons, T., Jeffers, N., Nolan, K. P., & Murray, D. B. (2017). Localised dynamics of laminar pulsatile flow in a rectangular channel. International Journal of Heat and Fluid Flow, 66, 8–17.

 

Peer Reviewed Conference Publications

1. Jeffers, N., Stafford, J., & Donnelly, B. (2014). Heat transfer and fluid mechanics from a piezoelectric fan operating in its second resonant frequency mode. In Proceedings of the 15th International Heat Transfer Conference, IHTC15-9227. doi (Vol. 10).

2. Jeffers, N., Punch, J. and Walsh, E., 2009, “Heat Transfer from Novel Target Surfaces to a Normally-Impinging, Submerged and Confined Water Jet”, Proceedings of the ASME Summer Heat Transfer Conference, HT2009-88279, San Francisco, CA, USA, July 19-23, doi: 10.1115/HT2009-88279.

3. Jeffers, N., Stafford, J., Nolan, K., Donnelly, B., Enright, R., Punch, J., Waddell, A., Ehrlich, L., O’Connor, J., Sexton, A., Blythman, R. and Hernon, D., 2014, “Microfluidic Cooling of Photonic Integrated Circuits (PICs)”, mFLU14-159 (Keynote),Proceedings of the 4th European Conference on Microfluidics (Microfluidics 2014), Limerick, Ireland, December 10-12.

4. Jeffers, N., Punch, J. and Walsh, E., 2007, “An Experimental Characterisation of Miniature Scale Cold Plates for Electronics Cooling Applications”, Proceedings of the ASME-JSME Thermal Engineering and Summer Heat Transfer Conference, HT2007-321537, Vancouver, BC, Canada, July 8-12, doi: 10.1115/HT2007-32537.

5. Jeffers, N., Punch, J. and Walsh, E., 2008, “An Investigation of Thermal and Velocity Fields for a Confined Jet over the Re Range of 1,000-20,000”, Proceedings of the ASME Heat Transfer, Fluids, Energy, Solar, and Nano Conferences, HT2008-56200, Jacksonville, FA, USA, August 10-14, doi: 10.1115/HT2008-56220.

6. Waddell, A.M., Punch, J., Jeffers, N. Stafford, J. and Stanley, W., 2013, “Mechanical Characterisation of a NiTi Shape Memory Alloy for Microfluidic Valve Applications”, MRS Spring Meeting & Exhibit, CCC3.08, San Francisco, CA, USA, April 1-5, doi: 10.1557/opl.2013.886.

7. Waddell, A.M., Punch, J., Jeffers, N. Stafford, J. and Stanley, W., 2013, “Mechanical Characterisation of a NiTi Shape Memory Alloy for Microfluidic Valve Applications”, MRS Spring Meeting & Exhibit, CCC3.08, San Francisco, CA, USA, April 1-5, doi: 10.1557/opl.2013.886.

8. Waddell, A.M., Punch, J., Stafford, J. and Jeffers, N., 2015, “The Local Heat Transfer Performance Downstream of a Representative Shape Memory Alloy (SMA) Structure”, Proceedings of SemiTherm 2015, San Jose, CA, March 15-19, doi: 10.1109/SEMI-THERM.2015.7100172.

9. O’Connor, J., Punch, J., Jeffers, N. and Stafford, J., 2015, “The Influence of Confinement on the Hydrodynamic Characteristics of a Cylindrical Pillar Within a Microchannel”, Proceedings of the ASME International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems (InterPACK) and the ASME International Conference on Nanochannels, Microchannels and Minichannels (ICNMM), InterPACKICNMM2015-48702, San Francisco, CA, July 6-9, doi: 10.1115/ICNMM2015-48701.

10. Punch, J., Walsh, E., Grimes, R., Jeffers, N., & Kearney, D. (2010). Jets and rotary flows for single-phase liquid cooling: an overview of some recent experimental findings. In Thermal, Mechanical & Multi-Physics Simulation, and Experiments in Microelectronics and Microsystems (EuroSimE), 2010 11th International Conference on (pp. 1–4). IEEE.

11. Stafford, J., Jeffers, N. (2014). Geometric structure of segmented flow networks. In Proc. 15th International Heat Transfer Conference (IHTC15), Kyoto.

12. Ehrlich, L., Punch, J., Jeffers, N. and Stafford, J., 2014, ‘Numerical and Experimental Characterisation of Valveless Piezoelectric Actuated Micropumps with Novel Diffuser Designs”, Proceedings of the 15th International Heat Transfer Conference, Kyoto, Japan, 10-15 August, doi: 10.1615/IHTC15.tmg.009461.

13. Blythman, R., Jeffers, N., Persoons, T., & Murray, D. B. (2016). Localized and time-resolved velocity measurements of pulsatile flow in a rectangular channel. In Eighteenth International Conference on Fluid Mechanics and Thermodynamics, Rio de Janeiro, Brazil.

14. Sexton, A., Punch, J., Jeffers, N. and Stafford, J., 2016, “Passive Control and Enhancement of the Heat Transfer Performance of Confined and Submerged Impinging Slot Jets”, Proceedings of the ASME International Mechanical Engineering Congress and Exposition, Volume 8: Heat Transfer and Thermal Engineering, V008T10A084, IMECE2016-66683, Phoenix, Arizona, USA, November 11-17, doi: 10.1115/IMECE2016-66683

15. Hickey, S., Punch, J., Jeffers, N. and Daly, J., 2011, “The Influence of Heat Spreading on the Thermal Control of Photonics Integrated Circuits”, ASME 2011 International Mechanical Engineering Congress & Exposition (IMECE2011-63697),Denver, CO, USA, doi: 10.1115/IMECE2011-63697.

16. Ehrlich, L., Punch, J., Jeffers N., and Stafford, J. (2014) “Experimental Characterization of Novel Microdiffuser Elements”, Journal of Physics: Conference Series, 525(1), 012008: doi:10.1088/1742-6596/525/1/012008.

17. O’Connor, J., Punch, J., Jeffers N. and Stafford, J. (2014) “A Dimensional Comparison Between Embedded 3D-Printed and Silicon Microchannels”, Journal of Physics: Conference Series, 525(1), 012009: doi:10.1088/1742-6596/525/1/012009.

18. Waddell, A., Punch, J., Stafford, J. and Jeffers N. (2014) “Hydrodynamic Characterization of a Passive Shape Memory Alloy Valve”, Journal of Physics: Conference Series, 525(1), 012010: doi:10.1088/1742-6596/525/1/012010.

19. Hickey, S., Punch, J. and Jeffers N. (2014) “Benchmarking of a Novel Contactless Characterisation Method for Micro Thermoelectric Modules (μTEMs)”, Journal of Physics: Conference Series, Vol. 525, 012021 doi:10.1088/1742-6596/525/1/012021.

20. Stafford, J., & Jeffers, N. (2014). Aerodynamic performance of a vibrating piezoelectric fan under varied operational conditions. In Journal of Physics: Conference Series (Vol. 525, p. 12025). IOP Publishing.

21. Jeffers, N., Nolan, K., Stafford, J., & Donnelly, B. (2014). High fidelity phase locked PIV measurements analysing the flow fields surrounding an oscillating piezoelectric fan. In Journal of Physics: Conference Series (Vol. 525, p. 12013). IOP Publishing.

22. Blythman, R., Persoons, T., Jeffers, N., & Murray, D. B. (2016). Effect of oscillation frequency on wall shear stress and pressure drop in a rectangular channel for heat transfer applications. In Journal of Physics: Conference Series (Vol. 745, p. 32044). IOP Publishing.

Books and Chapters

Completed PhDs under my supervision

1. Waddell, A. (2015). The Characterization of Obstructed Laminar Channel Flows for Local Heat Transfer Enhancement in Microfluidic Cooling Applications, Ph. D. thesis, University of Limerick, Ireland

2. Sexton, A. (2017). The Thermal and Hydrodynamic Behavior of Submerged and Confined, Normally-Impinging, Laminar Slot Jets, Ph. D. thesis, University of Limerick, Ireland

3. Ehrlich, L. (2017). The Characterization of Novel Obstacle-Type μDiffusers for Oscillatory μPump Applications in μFluidic Cooling Systems, Ph. D. thesis, University of Limerick, Ireland

4. Blythman, R. (2017). Laminar Pulsating Flow in a Rectangular Channel, Ph. D. thesis, Trinity College Dublin, Ireland

Patents

Patents

1. Jeffers, N., Daly, J., 2015, “Temperature Control Device With A Passive Thermal Feedback Control Valve”, Publish No US9181933

2. Jeffers, N., Stafford, J., Donnelly, B., 2017, “A Device for Moving Air”, Publish No EP2952077

3. Jeffers, N., Frizzell, R., Kelly, G.,2017,” Apparatus for harvesting energy”,Publish No EP2922107

Patents Pending 

1. Jeffers, N.,Donnelly, B., Stafford, J., Burns, O., 2013. Temperature Regulation Via Immersion In A Liquid. Publish No US20140321053

2. Jeffers, N., Donnelly, B., Stafford, J. (2013). Cooling device and a cooling assembly comprising the cooling device. Publish No US20140216696.

3. Jeffers, N., Donnelly, B., Daly, J.,2013, Cooling With Liquid Coolant And Bubble Heat Removal. Publish No WO/2014/177926

4. Jeffers, N.,Stafford, J. P., Donnelly, B. G., & Jeffers, N. M. (2014, January 17). Dendritic Tube Circular Fin Heat Exchanger. Publish No WO/2015/107419

5. Jeffers, N., Stafford, J., Donnelly, B., 2013, “A Rotary Fan”, Publish No EP2853750

6. Jeffers, N., Stafford, J., Donnelly, B., 2013, “An Apparatus For Moving A Fluid”, Publish No EP2884368

7. Jeffers, N., Stafford, J., Donnelly, B., Nolan, K., 2014, “A Fluidic Pump”, Publish No EP3021354

8. Jeffers, N., Agarwal, A., 2015, “Apparatus and Method for Operating an Oscillation Blade Device and a System Comprising the Apparatus”, Publish No EP3171038

9. Jeffers, N., Stafford, J., Donnelly, B., 2013, “A Device For Moving Air”, Publish No US20140219840

10. Jeffers, N., Frizzell, R., Donnelly, B., 2013, “Method And Apparatus For Assessment And Optimization Of Performance Of Piezoelectric Devices”, Publish No EP2818730

11. Jeffers, N., Stafford, J., Donnelly, B., 2014, “Apparatus and Method for Operating an Oscillation Blade Device and a System Comprising the Apparatus”, Publish No EP2960522

12. Jeffers, N., Stafford, J., Donnelly, B., Nolan, K., 2015, “A heat transfer method and device”, Publish No EP3096352

13. Jeffers, N., Donnelly, B., Daly, J., Rominski, P., Messana, S., Ling, W., 2013, “Apparatus For Cooling Board Mounted Optical Modules”, Publish No US20150077937

14. Jeffers, N., Stafford, J., Donnelly, B., Farrelly, R., 2015, “Apparatus And Method With Self-Assembling Metal Microchannels”, Publish No US20160379913

15. Jeffers, N., Daly, J., 2012, “A Fluidic Valve Unit”, Publish No EP2620681

16. Jeffers, N., Hernon, D., Daly, J., 2012, “Thermal Management Of Electronics And Photonics Equipment”, Publish No EP2618645

17. Jeffers, N., Donnelly, B., 2012, “Device For Thermoelectric Heat Exchange”, Publish No EP2645837

18. Jeffers, N., Donnelly, B., Daly, J., 2013, “Cooling Technique”, Publish No EP2819159

19. Jeffers, N., Stafford, J., Donnelly, B., 2014, “Apparatus Comprising an Oscillation Blade Fan and Method for Cleaning the Oscillation Blade Fan”, Publish No EP2960521

20. Jeffers, N., Stafford, J., Donnelly, B., Manning, P., 2014, “A Cooler Device”, Publish No EP3003000

21. Jeffers, N., Stafford, J., Donnelly, B., 2014, “An Energy harvesting Technique”, Publish No EP3002457

22. Jeffers, N., Frizzell, R., Donnelly, B., 2014, “A Cooling System, A Method For Cooling And An Electronic Apparatus”, Publish No EP3068203

23. Jeffers, N., Stafford, J., Donnelly, B., 2015, “A fluidic pump”, Publish No EP3185289

Filed with patent office

1. Jeffers, N., Stafford, J., 2016, “A Heat Transfer Structure”, Filed

2. Jeffers, N., Stafford, J., Donnelly, B., 2015, “A Perspiring Heat Sink”, Filed

3. Jeffers, N., Agarwal, A., O’Reilly Meehan, R., 2017, “Modular Heat Exchanger And Method For Making The Same”, Filed

4. Jeffers, N., O’Connell, D., Burns, O., 2017,” Strain Sensor Comprising A Viscous Piezoresistive Element”,Filed

5. Jeffers, N., Agarwal, A., O’Reilly Meehan, R., 2017, “Wick Structures And Heat Pipe Networks”, Filed

6. Jeffers, N., Agarwal, A., O’Reilly Meehan, R., 2017, “Package, And Method Of Manufacturing A Package Comprising An Enclosure And An Integrated Circuit”, Filed

7. Jeffers, N., Agarwal, A., O’Reilly Meehan, R., 2017, “Package, And Method Of Manufacturing A Package Comprising An Enclosure And An Integrated Circuit”, Filed