| Full text | |
| Author(s): |
Bernardi, M.
[1]
;
Silveira, Jr., V.
[1]
;
Telis, V. R. N.
[2]
;
Gabas, A. L.
[3]
;
Telis-Romero, J.
[2]
Total Authors: 5
|
| Affiliation: | [1] Univ Estadual Campinas, UNICAMP, Dept Engn Alimentos, BR-13083862 Campinas, SP - Brazil
[2] Univ Estadual Paulista, UNESP, Dept Engn & Tecnol Alimentos, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
[3] Univ Sao Paulo, Dept Engn Alimentos, FZEA, BR-13635900 Pirassununga, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Brazilian Journal of Chemical Engineering; v. 26, n. 2, p. 287-298, APR-JUN 2009. |
| Web of Science Citations: | 3 |
| Abstract | |
The steady-state heat transfer in laminar flow of liquid egg yolk - an important pseudoplastic fluid food - in circular and concentric annular ducts was experimentally investigated. The average convection heat transfer coefficients, determined by measuring temperatures before and after heating sections with constant temperatures at the tube wall, were used to obtain simple new empirical expressions to estimate the Nusselt numbers for fully established flows at the thermal entrance of the considered geometries. The comparisons with existing correlations for Newtonian and non-Newtonian fluids resulted in excellent agreement. The main contribution of this work is to supply practical and easily applicable correlations, which are, especially for the case of annulus, rather scarce and extensively required in the design of heat transfer operations dealing with similar shear-thinning products. In addition, the experimental results may support existing theoretical analyses. (AU) | |