Abstract
This paper treats the average mass velocity of laminar free convection inside a heated or cooled vertical tube situated in a large space. A one-dimensional model is proposed by applying the Poiseuille flow and the Graetz solution for forced convection in a tube and by considering both the pressure losses at the tube inlet and exit and in the hydrodynamic developing region. The average mass velocity of air is measured by means of the deflection of a fine quartz fiber in a cross-flow. The agreement between the theory and experiment is very good for the cases where the tube is partly heated and partly adiabatic, where the tube is partly heated and partly cooled, and with temperature stratification existing in the ambient fluid. At the same time, the effects of tube-to-ambient temperature difference, a reference temperature of the stratified ambient fluid, the tube length-to-diameter ratio and fluid's physical properties in the tube on the average mass velocity are clarified.
| Original language | English |
|---|---|
| Pages (from-to) | 3329-3337 |
| Number of pages | 9 |
| Journal | Transactions of the Japan Society of Mechanical Engineers Series B |
| Volume | 53 |
| Issue number | 495 |
| DOIs | |
| Publication status | Published - Jan 1 1987 |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanical Engineering
Cite this
Laminar Free Convection Flow Rate in a Vertical Tube (Its measurement and Theoretical Prediction). / Fuji, Tetsu; Koyama, Shigeru; Buenconsejo, N.
In: Transactions of the Japan Society of Mechanical Engineers Series B, Vol. 53, No. 495, 01.01.1987, p. 3329-3337.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Laminar Free Convection Flow Rate in a Vertical Tube (Its measurement and Theoretical Prediction)
AU - Fuji, Tetsu
AU - Koyama, Shigeru
AU - Buenconsejo, N.
PY - 1987/1/1
Y1 - 1987/1/1
N2 - This paper treats the average mass velocity of laminar free convection inside a heated or cooled vertical tube situated in a large space. A one-dimensional model is proposed by applying the Poiseuille flow and the Graetz solution for forced convection in a tube and by considering both the pressure losses at the tube inlet and exit and in the hydrodynamic developing region. The average mass velocity of air is measured by means of the deflection of a fine quartz fiber in a cross-flow. The agreement between the theory and experiment is very good for the cases where the tube is partly heated and partly adiabatic, where the tube is partly heated and partly cooled, and with temperature stratification existing in the ambient fluid. At the same time, the effects of tube-to-ambient temperature difference, a reference temperature of the stratified ambient fluid, the tube length-to-diameter ratio and fluid's physical properties in the tube on the average mass velocity are clarified.
AB - This paper treats the average mass velocity of laminar free convection inside a heated or cooled vertical tube situated in a large space. A one-dimensional model is proposed by applying the Poiseuille flow and the Graetz solution for forced convection in a tube and by considering both the pressure losses at the tube inlet and exit and in the hydrodynamic developing region. The average mass velocity of air is measured by means of the deflection of a fine quartz fiber in a cross-flow. The agreement between the theory and experiment is very good for the cases where the tube is partly heated and partly adiabatic, where the tube is partly heated and partly cooled, and with temperature stratification existing in the ambient fluid. At the same time, the effects of tube-to-ambient temperature difference, a reference temperature of the stratified ambient fluid, the tube length-to-diameter ratio and fluid's physical properties in the tube on the average mass velocity are clarified.
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U2 - 10.1299/kikaib.53.3329
DO - 10.1299/kikaib.53.3329
M3 - Article
AN - SCOPUS:0023452207
VL - 53
SP - 3329
EP - 3337
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 495
ER -