Experimental Validation of Numerical Model of Flow in Pump-Intake Bays
Experiments were conducted in a laboratory model to validate a numerical model developed to simulate the three-dimensional turbulent flow in a water-pump-intake bay. The laboratory model was designed to reproduce the essential flow features of practical installations, including free-surface and wall...
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| Veröffentlicht in: | Journal of hydraulic engineering (New York, N.Y.) N.Y.), 1999-11, Vol.125 (11), p.1119-1125 |
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| container_issue | 11 |
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| container_title | Journal of hydraulic engineering (New York, N.Y.) |
| container_volume | 125 |
| creator | Rajendran, V. P Constantinescu, S. G Patel, V. C |
| description | Experiments were conducted in a laboratory model to validate a numerical model developed to simulate the three-dimensional turbulent flow in a water-pump-intake bay. The laboratory model was designed to reproduce the essential flow features of practical installations, including free-surface and wall-attached vortices, but was geometrically simple to enable the numerical model to be applied without undue complications of grid topology. The experiments involved flow visualizations and measurements with particle image velocimetry. The numerical model solves the Reynolds-averaged Navier-Stokes equations with a near-wall turbulence model. In the validation of this numerical model, therefore, emphasis was placed on prediction of the average properties of the various types of vortices that were found in the experiments. The predicted number, location, and general structure of the vortices were found to be in good agreement with those observed in the experiments, but they were generally larger and weaker than the measured ones. These differences are attributed to the unsteadiness of the flow and inadequacy of the turbulence model. |
| doi_str_mv | 10.1061/(ASCE)0733-9429(1999)125:11(1119) |
| format | Article |
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P ; Constantinescu, S. G ; Patel, V. C</creator><creatorcontrib>Rajendran, V. P ; Constantinescu, S. G ; Patel, V. C</creatorcontrib><description>Experiments were conducted in a laboratory model to validate a numerical model developed to simulate the three-dimensional turbulent flow in a water-pump-intake bay. The laboratory model was designed to reproduce the essential flow features of practical installations, including free-surface and wall-attached vortices, but was geometrically simple to enable the numerical model to be applied without undue complications of grid topology. The experiments involved flow visualizations and measurements with particle image velocimetry. The numerical model solves the Reynolds-averaged Navier-Stokes equations with a near-wall turbulence model. In the validation of this numerical model, therefore, emphasis was placed on prediction of the average properties of the various types of vortices that were found in the experiments. The predicted number, location, and general structure of the vortices were found to be in good agreement with those observed in the experiments, but they were generally larger and weaker than the measured ones. These differences are attributed to the unsteadiness of the flow and inadequacy of the turbulence model.</description><identifier>ISSN: 0733-9429</identifier><identifier>EISSN: 1943-7900</identifier><identifier>DOI: 10.1061/(ASCE)0733-9429(1999)125:11(1119)</identifier><identifier>CODEN: JHEND8</identifier><language>eng</language><publisher>Reston, VA: American Society of Civil Engineers</publisher><subject>Applied sciences ; Buildings. Public works ; Computation methods. Tables. Charts ; Computational fluid dynamics ; Computer simulation ; Exact sciences and technology ; Flow patterns ; Hydraulic constructions ; Mathematical models ; Navier Stokes equations ; Numerical analysis ; Pumps ; Structural analysis. 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P</creatorcontrib><creatorcontrib>Constantinescu, S. G</creatorcontrib><creatorcontrib>Patel, V. C</creatorcontrib><title>Experimental Validation of Numerical Model of Flow in Pump-Intake Bays</title><title>Journal of hydraulic engineering (New York, N.Y.)</title><description>Experiments were conducted in a laboratory model to validate a numerical model developed to simulate the three-dimensional turbulent flow in a water-pump-intake bay. The laboratory model was designed to reproduce the essential flow features of practical installations, including free-surface and wall-attached vortices, but was geometrically simple to enable the numerical model to be applied without undue complications of grid topology. The experiments involved flow visualizations and measurements with particle image velocimetry. The numerical model solves the Reynolds-averaged Navier-Stokes equations with a near-wall turbulence model. In the validation of this numerical model, therefore, emphasis was placed on prediction of the average properties of the various types of vortices that were found in the experiments. The predicted number, location, and general structure of the vortices were found to be in good agreement with those observed in the experiments, but they were generally larger and weaker than the measured ones. These differences are attributed to the unsteadiness of the flow and inadequacy of the turbulence model.</description><subject>Applied sciences</subject><subject>Buildings. Public works</subject><subject>Computation methods. Tables. Charts</subject><subject>Computational fluid dynamics</subject><subject>Computer simulation</subject><subject>Exact sciences and technology</subject><subject>Flow patterns</subject><subject>Hydraulic constructions</subject><subject>Mathematical models</subject><subject>Navier Stokes equations</subject><subject>Numerical analysis</subject><subject>Pumps</subject><subject>Structural analysis. Stresses</subject><subject>TECHNICAL PAPERS</subject><subject>Turbulent flow</subject><subject>Unsteady flow</subject><subject>Vortex flow</subject><subject>Water collecting, well, pumping</subject><subject>Water supply. Pipings. 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Charts</topic><topic>Computational fluid dynamics</topic><topic>Computer simulation</topic><topic>Exact sciences and technology</topic><topic>Flow patterns</topic><topic>Hydraulic constructions</topic><topic>Mathematical models</topic><topic>Navier Stokes equations</topic><topic>Numerical analysis</topic><topic>Pumps</topic><topic>Structural analysis. Stresses</topic><topic>TECHNICAL PAPERS</topic><topic>Turbulent flow</topic><topic>Unsteady flow</topic><topic>Vortex flow</topic><topic>Water collecting, well, pumping</topic><topic>Water supply. Pipings. Water treatment</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rajendran, V. P</creatorcontrib><creatorcontrib>Constantinescu, S. G</creatorcontrib><creatorcontrib>Patel, V. 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| fulltext | fulltext |
| identifier | ISSN: 0733-9429 |
| ispartof | Journal of hydraulic engineering (New York, N.Y.), 1999-11, Vol.125 (11), p.1119-1125 |
| issn | 0733-9429 1943-7900 |
| language | eng |
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| source | American Society of Civil Engineers:NESLI2:Journals:2014 |
| subjects | Applied sciences Buildings. Public works Computation methods. Tables. Charts Computational fluid dynamics Computer simulation Exact sciences and technology Flow patterns Hydraulic constructions Mathematical models Navier Stokes equations Numerical analysis Pumps Structural analysis. Stresses TECHNICAL PAPERS Turbulent flow Unsteady flow Vortex flow Water collecting, well, pumping Water supply. Pipings. Water treatment |
| title | Experimental Validation of Numerical Model of Flow in Pump-Intake Bays |
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