Heat transfer measurement in rectangular channel with detach ribs by liquid crystal thermography

Heat transfer measurement in rectangular channel with detach ribs by liquid crystal thermography

Sibendra Kumar GharaiApurba Layek 

Mechanical Engineering Department, NIT Durgapur 713209, India

Corresponding Author Email: 
skgharai@gmail.com
Page: 
1502-1509
|
DOI: 
https://doi.org/10.18280/ijht.360444
Received: 
27 March 2018
| |
Accepted: 
6 September 2018
| | Citation

OPEN ACCESS

Abstract: 

Heat transfer is measured in a rectangular channel with detach transverse square ribs using liquid crystal thermography. The ribs were provided on one broad wall of rectangular duct of aspect ratio 4. The roughened surface was heated uniformly. The roughness parameters selected for this study were, relative roughness pitch (P/e) of values 7-11, clearance ratio (C/e) of values 0.37-0.57 and Reynolds number (Re) of values 8100-22300. The heat transfer coefficient has been compared with attached transverse square ribs at similar operating condition and result reveals that detach rib roughness is better than the attach ribs. It is observed that the thermal performance parameter increases with increase in Reynolds number.

Keywords: 

aspect ratio, detach rib, liquid crystal thermography, relative roughness pitch, thermal performance parameter

1. Introduction
2. Experimental Setup
3. Liquid Crystal Calibration
4. Experimental Procedure and Data Reduction
5. Experimental Uncertainty
6. Results and Discussion
7. Performance Evaluation
8. Comparison of Detach Rib with Attached Rib
9. Conclusions
Acknowledgements
Nomenclature
  References

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