Abstract
Experimental visualizations and numerical simulations of a horizontal hot water jet entering cold water into a rectangular storage tank are described. Three different temperature differences and their corresponding Reynolds numbers are considered. Both experimental visualization and numerical computations are carried out for the same flow and thermal conditions. The realizable k − ε model is used for modeling the turbulent flow while the buoyancy is modeled using the Boussinesq approximation. Polynomial approximations of the water properties are used to compare with the Boussinesq approximation. Numerical solutions are obtained for unsteady flow while pressure, velocity, temperature and turbulence distributions inside the water tank as well as the Froude number are analyzed. The experimental visualizations are performed at intervals of five seconds for all different cases. The simulated results are compared with the visualized results, and both of them show the stratification phenomena and buoyancy force effects due to temperature difference and density variation. After certain times, depending on the case condition, the flow tends to reach a steady state.
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KNUDSEN S., FURBO S. and SHAH L. J. Design of the inlet to the mantle in a vertical mantle storage tank[C]. Proceedings ISES 2001 Solar World Congress. Adelaide, Australia, 2001.
SHAH L. J., FURBO S. Entrance effects in solar storage tanks[J]. Solar Energy, 2003, 75(4): 337–348.
JORDAN U., FURBO S. Investigations of the flow into a storage tank by means of advanced experimental and theoretical methods[C]. ISES Solar World Congress. Goteborg, Sweden, 2003.
KNUDSEN S., MORRISON G. L. and BEHNIA M. et al. Analysis of the flow structure and heat transfer in a vertical mantle heat exchanger[C]. ISES Solar World Congress. Goteborg, Sweden, 2003.
El-AMIN M. F., HEIDEMANN W. and MÜLLERSTEINHAGEN H. Turbulent jet flow into a water store[C]. Proceedings Heat Transfer in Components and Systems for Sustainable Energy Technologies. Grenoble, France, 2005, 345–350.
El-AMIN M. F., SUN S. and HEIDEMANN W. et al. Analysis of a turbulent buoyant confined jet modeled using realizable model[J]. Heat Mass Transfer, 2010, 46(8): 943–960.
PANTHALOOKARAN V., El-AMIN M. F. and HEIDEMANN W. et al. Calibrated models for simulation of stratified hot water heat stores[J]. International Journal of Energy Research, 2008, 32(7): 661–676.
FUKUSHIMA C., AANEN L. and WESTERWEEL J. Investigation of the mixing process in an axisymmetric turbulent jet using PIV and LIF[C]. Proceedings 10th International Symposium Applications of Laser Techniques Fluid Mechanics, Lisbon, Portugal, 2000.
AGRAWAL A., PRASAD A. K. Integral solution for the mean flow profiles of turbulent jets, plumes, and wakes[J]. Journal of Fluids Engineering, 2003, 125(5): 813–822.
ARAKERI J. H., DAS D. and SRINIVASAN J. Bifurcation in a buoyant horizontal laminar jet[J]. Journal of Fluid Mechanics, 2000, 412: 61–73.
O’hupern T. J., WECKMAN E. J. and GERHART A. L. et al. Experimental study of a turbulent buoyant helium plume[J]. Journal of Fluid Mechanics, 2005, 544: 143–171.
El-AMIN M. F., KANAYAMA H. Integral solutions for selected turbulent quantities of small-scale hydrogen leakage: A non-buoyant jet or momentum-dominated buoyant jet regime[J]. International Journal of Hydrogen Energy, 2009, 34(3): 1607–1612.
El-AMIN M. F., KANAYAMA H. Similarity consideration of the buoyant jet resulting from hydrogen leakage[J]. International Journal of Hydrogen Energy, 2009, 34(14): 5803–5809.
El-AMIN M. F. Non-Boussinesq turbulent buoyant jet resulting from hydrogen leakage in air[J]. Internatinal Journal of Hydrogen Energy, 2009, 34(3): 7873–788.
JIRKA G. H. Integral model for turbulent buoyant jets in unbounded stratified flows, Part 1: Single round jet[J]. Environmental Fluid Mechanics, 2004, 4(1): 1–56.
JIRKA G. H. Integral model for turbulent buoyant jets in unbounded stratified flows, Part 2: Plane jet dynamics resulting from multiport diffuser jets[J]. Environmentai Fluid Mechanics, 2006, 6(1): 43–100.
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Biography: EL-AMIN M. F. (1971-), Male, Ph. D., Research Scientist
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El-Amin, M.F., Sun, S. & Salam, A. Simulation of buoyancy-induced turbulent flow from a hot horizontal jet. J Hydrodyn 26, 104–113 (2014). https://doi.org/10.1016/S1001-6058(14)60012-3
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DOI: https://doi.org/10.1016/S1001-6058(14)60012-3