Abstract
A thermally stratified internal hydraulic jump in a fresh water ambient, which has a temperature equal to or greater than 4 °C, is investigated theoretically and experimentally. The thermal jump solutions obtained using a nonlinear buoyancy function are compared with the density jump solutions obtained using a linear buoyancy function. The study reveals considerable difference between thermal and density jump behaviour in a range of temperature above 4 °C. The error of treating a thermal jump as a density jump is found to increase with Froude number and temperature difference and decrease with ambient temperature. Thermal jump-experiments are conducted at ambient water temperatures of 4 °C and 16 °C. The two sets of experiments have identical Froude number, Reynolds number and temperature difference. Experimental observations compare favourably with the thermal jump theory. The analysis of temperature fluctuations suggests that ambient temperature is also modifying the internal mixing characteristics of thermal jumps.
Publisher
Cambridge University Press (CUP)
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Reference7 articles.
1. Long, R. R. :1953 Some aspects of the flow of stratified fluids: a theoretical investigation.Tellus 5,42–58.
2. Wilkinson, D. L. & Wood, I. R. ,1971 A rapidly varied flow phenomenon in a two-llayer flow.J. Fluid Mech. 47.241–256.
3. Baddour, R. E. :1987 Hydraulics of shallow and stratified mixing channel.J. Hydraul Engng Div. ASCE 113,630–645.
4. Benton, G. S. :1954 The occurrence of critical flow and hydraulic jumps in a multi-layered fluid system.J. Met. 11,139–150.
5. Belanger, J. B. :1850 Notes sur le cours d' hydraulique.Ecole Centrale des Arts et Manufactures, France.
Cited by
9 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献