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. 2020 Sep 1;32(9):093312. doi: 10.1063/5.0024272

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Copyright © 2020 Author(s)

Published under license by AIP Publishing.

1070-6631/2020/32(9)/093312/13/$30.00

All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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FIG. 4. — The transient Nusselt correlation [Eq. (8)] is compared with the steady-state Whitaker⁴⁴ correlation [Eq. (7)]. The results concern the case of Re = 250 and d_p = 250 µm. The transient correlation results have been obtained for Pr_∞ = 0.71, σ_t = 0.1, ${c_{p}}_{\infty} / {c_{p}}_{t_{d}} = 0.5$ , $μ_{\infty} / μ_{t_{d}} = 0.9$ , ρ_d = 1000 kg · m⁻³, ${c_{p}}_{d} = 4180 J \cdot k g^{- 1} \cdot K^{- 1}$ , and k_∞ = 0.026 W · m⁻¹ · K⁻¹.