Turbulence measurements using a nanoscale thermal anemometry probe

Sean C.C. Bailey; Gary J. Kunkel; Marcus Hultmark; Margit Vallikivi; Jeffrey P. Hill; Karl A. Meyer; Candice Tsay; Craig B. Arnold; Alexander J. Smits

doi:10.1017/S0022112010003447

Turbulence measurements using a nanoscale thermal anemometry probe

Sean C.C. Bailey, Gary J. Kunkel, Marcus Hultmark, Margit Vallikivi, Jeffrey P. Hill, Karl A. Meyer, Candice Tsay, Craig B. Arnold, Alexander J. Smits

Research output: Contribution to journal › Article › peer-review

145 Scopus citations

Abstract

A nanoscale thermal anemometry probe (NSTAP) has been developed to measure velocity fluctuations at ultra-small scales. The sensing element is a free-standing platinum nanoscale wire, 100 nm×2 μm × 60 μm, suspended between two current-carrying contacts and the sensor is an order of magnitude smaller than presently available commercial hot wires. The probe is constructed using standard semiconductor and MEMS manufacturing methods, which enables many probes to be manufactured simultaneously. Measurements were performed in grid-generated turbulence and compared to conventional hot-wire probes with a range of sensor lengths. The results demonstrate that the NSTAP behaves similarly to conventional hot-wire probes but with better spatial resolution and faster temporal response. The results are used to investigate spatial filtering effects, including the impact of spatial filtering on the probability density of velocity and velocity increment statistics.

Original language	English
Pages (from-to)	160-179
Number of pages	20
Journal	Journal of Fluid Mechanics
Volume	663
DOIs	https://doi.org/10.1017/S0022112010003447
State	Published - Nov 25 2010

Bibliographical note

Funding Information:
This work was made possible by NSF MRI Grant CTS-0421147 and NSF Grant CTS-0625268, monitored by M. W. Plesniak and W. B. Schultz. The authors would also like to thank A. Ashok for his help setting up the grid turbulence measurements.

Keywords

MEMS/NEMS
turbulent flows

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Applied Mathematics

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10.1017/S0022112010003447

Cite this

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title = "Turbulence measurements using a nanoscale thermal anemometry probe",

abstract = "A nanoscale thermal anemometry probe (NSTAP) has been developed to measure velocity fluctuations at ultra-small scales. The sensing element is a free-standing platinum nanoscale wire, 100 nm×2 μm × 60 μm, suspended between two current-carrying contacts and the sensor is an order of magnitude smaller than presently available commercial hot wires. The probe is constructed using standard semiconductor and MEMS manufacturing methods, which enables many probes to be manufactured simultaneously. Measurements were performed in grid-generated turbulence and compared to conventional hot-wire probes with a range of sensor lengths. The results demonstrate that the NSTAP behaves similarly to conventional hot-wire probes but with better spatial resolution and faster temporal response. The results are used to investigate spatial filtering effects, including the impact of spatial filtering on the probability density of velocity and velocity increment statistics.",

keywords = "MEMS/NEMS, turbulent flows",

author = "Bailey, {Sean C.C.} and Kunkel, {Gary J.} and Marcus Hultmark and Margit Vallikivi and Hill, {Jeffrey P.} and Meyer, {Karl A.} and Candice Tsay and Arnold, {Craig B.} and Smits, {Alexander J.}",

note = "Funding Information: This work was made possible by NSF MRI Grant CTS-0421147 and NSF Grant CTS-0625268, monitored by M. W. Plesniak and W. B. Schultz. The authors would also like to thank A. Ashok for his help setting up the grid turbulence measurements.",

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doi = "10.1017/S0022112010003447",

language = "English",

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AU - Bailey, Sean C.C.

AU - Kunkel, Gary J.

AU - Hultmark, Marcus

AU - Vallikivi, Margit

AU - Hill, Jeffrey P.

AU - Meyer, Karl A.

AU - Tsay, Candice

AU - Arnold, Craig B.

AU - Smits, Alexander J.

N1 - Funding Information: This work was made possible by NSF MRI Grant CTS-0421147 and NSF Grant CTS-0625268, monitored by M. W. Plesniak and W. B. Schultz. The authors would also like to thank A. Ashok for his help setting up the grid turbulence measurements.

PY - 2010/11/25

Y1 - 2010/11/25

N2 - A nanoscale thermal anemometry probe (NSTAP) has been developed to measure velocity fluctuations at ultra-small scales. The sensing element is a free-standing platinum nanoscale wire, 100 nm×2 μm × 60 μm, suspended between two current-carrying contacts and the sensor is an order of magnitude smaller than presently available commercial hot wires. The probe is constructed using standard semiconductor and MEMS manufacturing methods, which enables many probes to be manufactured simultaneously. Measurements were performed in grid-generated turbulence and compared to conventional hot-wire probes with a range of sensor lengths. The results demonstrate that the NSTAP behaves similarly to conventional hot-wire probes but with better spatial resolution and faster temporal response. The results are used to investigate spatial filtering effects, including the impact of spatial filtering on the probability density of velocity and velocity increment statistics.

AB - A nanoscale thermal anemometry probe (NSTAP) has been developed to measure velocity fluctuations at ultra-small scales. The sensing element is a free-standing platinum nanoscale wire, 100 nm×2 μm × 60 μm, suspended between two current-carrying contacts and the sensor is an order of magnitude smaller than presently available commercial hot wires. The probe is constructed using standard semiconductor and MEMS manufacturing methods, which enables many probes to be manufactured simultaneously. Measurements were performed in grid-generated turbulence and compared to conventional hot-wire probes with a range of sensor lengths. The results demonstrate that the NSTAP behaves similarly to conventional hot-wire probes but with better spatial resolution and faster temporal response. The results are used to investigate spatial filtering effects, including the impact of spatial filtering on the probability density of velocity and velocity increment statistics.

KW - MEMS/NEMS

KW - turbulent flows

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JO - Journal of Fluid Mechanics

JF - Journal of Fluid Mechanics

ER -

Turbulence measurements using a nanoscale thermal anemometry probe

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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