Multi-walled carbon nano-tubes for performance enhancement of thin film heat flux sensors

Surface heat transfer measurement is an important aspect in many research problems. Thin film heat flux sensor (TFHFS) is mostly considered in such situations for heat flux measurement due to its quick response and high accuracy. In the present studies, multi-walled carbon nanotubes (MWCNTs) are mix...

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Bibliographic Details
Published in:Heat and mass transfer 2020-05, Vol.56 (5), p.1537-1549
Main Authors: Jadhav, Akash, Peetala, Ravi, Kulkarni, Vinayak
Format: Article
Language:English
Subjects:
Engineering
Engineering Thermodynamics
Heat
Heat and Mass Transfer
Heat flux
Heat recovery
Heat transfer
Industrial Chemistry/Chemical Engineering
Multi wall carbon nanotubes
Original
Performance enhancement
Platinum
Sensitivity enhancement
Sensors
Substrates
Thermodynamics
Thin films
Tubes
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Summary:Surface heat transfer measurement is an important aspect in many research problems. Thin film heat flux sensor (TFHFS) is mostly considered in such situations for heat flux measurement due to its quick response and high accuracy. In the present studies, multi-walled carbon nanotubes (MWCNTs) are mixed with platinum while making the TFHFSs. Such addition is noticed to increase the sensitivity and decrease the temperature coefficient of resistance (TCR) of the thin film sensors. Improved sensitivity by 151% and 119% for Macor and Quartz sensors has led to increase in strength of the temperature response of the sensors during dynamic calibration experiments. Though heat flux recovery is seen to have encouraging agreement for all the sensors, sensitivity enhancement is noticed to be more prominent and advantageous for Macor based sensors. Present studies recommend adequately finished substrate for better adhesion. Further, use of MWCNTs is advisable especially for low heat flux measurement and also for Macor substrate since either situation demands the higher sensitivity to increase the output response.
ISSN:0947-7411
1432-1181
DOI:10.1007/s00231-019-02765-0