Evaluation of candidate strategies for the estimation of local heat transfer coefficient from wall jets. Issue 1 (2nd January 2020)

• Record Type: Journal Article
• Authors: Godi, Sangamesh C.; Abraham, Satyanand; Pattamatta, Arvind; Balaji, C.
• Is Part Of: Experimental heat transfer. Volume 33:Issue 1(2020)
• Page Start: 40
• Page End: 63
• Publication Date: 2020-01-02
• Subjects: Wall jet heat transfer -- semi infinite approximation -- infrared thermography -- uniform wall heat flux condition; Heat -- Transmission -- Measurement -- Periodicals; 621.4022
• DOI: 10.1080/08916152.2019.1570983
• Languages: English
• ISSNs: 0891-6152

Abstract

ABSTRACT: This paper reports results of experimental investigations on planar and three-dimensional wall jets over a flat surface. The local heat transfer coefficient is estimated at transient conditions with a semi-infinite approximation and at steady state conditions with a uniform wall heat flux boundary. Liquid crystal thermography and infrared thermography are used to map the surface temperatures. Experiments are performed for 2000 ≤ Re ≤ 8000 and 0 ≤ x/L ≤ 80. Results show that transient infrared thermography with semi-infinite approximation is a better candidate for the estimation of the heat transfer coefficient from wall jets.