2014
DOI: 10.1017/jfm.2014.170
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Evolution of the scalar dissipation rate downstream of a concentrated line source in turbulent channel flow

Abstract: The dissipation rate, εθ, of a passive scalar (temperature in air) emitted from a concentrated source into a fully developed high-aspect-ratio turbulent channel flow is studied. The goal of the present work is to investigate the return to isotropy of the scalar field when the scalar is injected in a highly anisotropic manner into an inhomogeneous turbulent flow at small scales. Both experiments and direct numerical simulations (DNS) were used to study the downstream evolution of εθ for scalar fields generated … Show more

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Cited by 9 publications
(8 citation statements)
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“…The spatial resolution denoted medium fell in between the other two. Leveraging their results, we chose a grid consistent with their medium resolution for our simulations at Re τ = 190 and Pr (≡ν/α) = 0.7, which also satisfactorily reproduced prior experimental results [57].…”
Section: Numerical Simulationsmentioning
confidence: 64%
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“…The spatial resolution denoted medium fell in between the other two. Leveraging their results, we chose a grid consistent with their medium resolution for our simulations at Re τ = 190 and Pr (≡ν/α) = 0.7, which also satisfactorily reproduced prior experimental results [57].…”
Section: Numerical Simulationsmentioning
confidence: 64%
“…The present data agrees with established analytic profiles as well as the results of Refs. [57,62]. The rms profiles of the three velocity components are also validated against the works of Refs.…”
Section: B Velocity Fieldmentioning
confidence: 80%
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“…At room temperature, aluminum nanoparticles have a TC of 237 W/mK, while water has a TC of 0.605 W/Mk [28]. Water's TC when aluminum nanoparticles are used as a component of the nanoparticle fixation between 1% and 8% is shown in Table 1.…”
Section: Table 1 Tc Of Nanofluids (Water + Aluminum)mentioning
confidence: 99%