Premium
Residence time distributions in short tubular vessels
Author(s) -
Veeraraghavan S.,
Silveston P. L.
Publication year - 1971
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450490309
Subject(s) - nozzle , residence time distribution , reynolds number , mechanics , residence time (fluid dynamics) , mathematics , range (aeronautics) , jet (fluid) , pulse (music) , flow (mathematics) , physics , materials science , thermodynamics , turbulence , engineering , optics , geotechnical engineering , detector , composite material
The results of an experimental study of the influence of vessel dimensions and fluid velocity on residence time distributions (RTD's) are presented. Length to diameter ratio (L/D) exerts the major influence on the RTD for the range of sizes and velocities studied. At L/D ≤ 2.6, the RTD resembles the response of a well stirred vessel with by‐passing to a pulse signal. Both Reynolds No. (N Re ) and nozzle to vessel diameter ratio (d/D) effect the RTD. At L/D ≥ 5.2, the RTD resembles the response of stirred tanks in series to a pulse. N Re and d/D do not effect the RTD and can be neglected for scale‐up. The second and third moments of the RTD's and parameters of a finite stage model fitted to the RTD relate qualitatively to L/D, d/D and N Re , but neither the moments or the particular finite stage model used are satisfactory for quantitative correlations.