Perspectives on the simulation of micro gas and nano liquid flows

Jason Reese, William Nicholls

Research output: Contribution to conferencePaper

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Abstract

Micro- and nano-scale fluid systems can behave very differently from their macro-scale counterparts. Remarkably, there is no sufficiently accurate, computationally efficient, and — most importantly — generally agreed fluid dynamic model that encapsulates all of this important behaviour. The only thing that researchers can agree on is that the conventional Navier-Stokes fluid equations are unable to capture the unique complexity of these often locally non-thermodynamic-equilibrium flows. Here, we outline recent work on developing and exploring new models for these flows, highlighting, in particular, slip flow as a quintessential non-equilibrium (or sub-continuum) phenomenon.
We describe the successes and failures of various hydrodynamic and molecular models in capturing the non-equilibrium flow physics in current test applications in micro and nano engineering, including the aerodynamic drag of a sphere in a rarefied gas, and the flow of water along carbon nanotubes.
Original languageEnglish
Number of pages10
Publication statusPublished - 19 Jun 2011
Event9th ASME International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2011 - Edmonton, Canada
Duration: 19 Jun 201122 Jun 2011

Conference

Conference9th ASME International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2011
CountryCanada
CityEdmonton
Period19/06/1122/06/11

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Liquid Flow
Gases
Aerodynamic drag
Carbon Nanotubes
Flow of water
Fluids
Liquids
Fluid dynamics
Non-equilibrium
Macros
Dynamic models
Carbon nanotubes
Simulation
Hydrodynamics
Physics
Slip Flow
Rarefied Gas
Fluid
Non-equilibrium Thermodynamics
Fluid Model

Cite this

Reese, J., & Nicholls, W. (2011). Perspectives on the simulation of micro gas and nano liquid flows. Paper presented at 9th ASME International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2011, Edmonton, Canada.
Reese, Jason ; Nicholls, William. / Perspectives on the simulation of micro gas and nano liquid flows. Paper presented at 9th ASME International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2011, Edmonton, Canada.10 p.
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Reese, J & Nicholls, W 2011, 'Perspectives on the simulation of micro gas and nano liquid flows', Paper presented at 9th ASME International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2011, Edmonton, Canada, 19/06/11 - 22/06/11.

Perspectives on the simulation of micro gas and nano liquid flows. / Reese, Jason; Nicholls, William.

2011. Paper presented at 9th ASME International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2011, Edmonton, Canada.

Research output: Contribution to conferencePaper

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AU - Nicholls, William

PY - 2011/6/19

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AB - Micro- and nano-scale fluid systems can behave very differently from their macro-scale counterparts. Remarkably, there is no sufficiently accurate, computationally efficient, and — most importantly — generally agreed fluid dynamic model that encapsulates all of this important behaviour. The only thing that researchers can agree on is that the conventional Navier-Stokes fluid equations are unable to capture the unique complexity of these often locally non-thermodynamic-equilibrium flows. Here, we outline recent work on developing and exploring new models for these flows, highlighting, in particular, slip flow as a quintessential non-equilibrium (or sub-continuum) phenomenon.We describe the successes and failures of various hydrodynamic and molecular models in capturing the non-equilibrium flow physics in current test applications in micro and nano engineering, including the aerodynamic drag of a sphere in a rarefied gas, and the flow of water along carbon nanotubes.

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Reese J, Nicholls W. Perspectives on the simulation of micro gas and nano liquid flows. 2011. Paper presented at 9th ASME International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2011, Edmonton, Canada.