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Applied Scientific Research

, Volume 25, Issue 1, pp 372–382 | Cite as

Experimental results of pure and simultaneous heat and mass transfer by free convection about a vertical cylinder for Pr=0.71 and Sc=0.63

  • F. A. Bottemanne
Article

Abstract

In this paper experimental results are given concerning stationary heat and mass transfer in the laminar boundary layer of a vertical cylinder placed in still air. The combined effect is considered as well as the two separate effects.

Measurements are carried out on heat transfer and evaporation of water. Results are in close agreement with the classical free convection boundary layer theory for a vertical flat plate, if only a small cylinder correction is applied.

Keywords

Heat Transfer Evaporation Convection Boundary Layer Close Agreement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Nomenclature

A1, A2

coefficients defined in § 4

C

empirical constant defined in § 3

D

mass diffusivity

Grx, GrL

local and mean Grashof number

Grx,T, Grx,c

local heat and mass Grashof number

h

heat of evaporation

n

zone number

Nux, NuL

local and mean Nusselt number

Pr

Prandtl number

r0

cylinder radius

S

slope defined in § 4

Sc

Schmidt number

Shx, ShL

local and mean Sherwood number

x

vertical coordinate along the plate

δ

parameter defined in § 3

Δ

height of zone

Θ0

temperature difference between wall and surroundings

ϑ′(0)

dimensionless temperature gradient at the wall

λ

thermal conductivity

ρ

total density

φ″x,1

local heat flux

φ″x,2

local mass flux

φn,1

heat flow in nth zone

φn,2

mass flow in nth zone

φn

totally dissipated power in nth zone

φr

radiation flow

Ω0

mass fraction difference between wall and surroundings

ω′(0)

dimensionless mass gradient at the wall

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References

  1. [1]
    Schmidt, E., W. Beckmann and W. Pohlhausen, Techn. Mech. u. Thermodyn. 1 (1930) 341, 391.Google Scholar
  2. [2]
    Ostrach, S., NACA TN 2635 (1952) or NACA Rept. 1111 (1953).Google Scholar
  3. [3]
    Nusselt, W., Z. VDI 60 (1916) 102, 541, 565.Google Scholar
  4. [4]
    Wilke, C. R., C. W. Tobias and M. Eisenberg, Chem. Eng. Progr. 49 (1953) 663.Google Scholar
  5. [5]
    Bottemanne, F. A., Appl. Sci. Res. 25 (1971) 137.zbMATHGoogle Scholar
  6. [6]
    Bottemanne, F. A., Thesis, Delft (1970) (in Dutch). Also appeared as Meded. Landbouwhogeschool-Wageningen 70-11-(1970).Google Scholar
  7. [7]
    Adams, J. A. and P. W. McFadden, A.I.Ch.E. Journal 12 (1966) 642.Google Scholar
  8. [8]
    Somers, E. V., J. Appl. Mech. 23 (1956) 295.Google Scholar
  9. [9]
    Wilcox, W. R., Chem. Eng. Sci. 13 (1961) 113.Google Scholar
  10. [10]
    De Leeuw den Bouter, J. A., B. de Munnik and P. M. Heertjes, Chem. Eng. Sci. 23 (1968) 1185.Google Scholar
  11. [11]
    Mathers, W. G., A. J. Madden and E. L. Piret, Ind. Eng. Chem. 49 (1957) 963.CrossRefGoogle Scholar
  12. [12]
    Sparrow, E. M. and J. L. Gregg, Trans. A.S.M.E. 80 (1956) 1823.Google Scholar

Copyright information

© Martinus Nijhoff 1972

Authors and Affiliations

  • F. A. Bottemanne
    • 1
  1. 1.Dept. of Physics and MeteorologyWageningen University of AgricultureWageningenThe Netherlands

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