Verfügbarkeit: A contribution to turbulence modelling in bubbly flows

A contribution to turbulence modelling in bubbly flows:

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Bibliographische Detailangaben
Beteilige Person:	Ma, Tian 1985- (VerfasserIn)
Format:	Hochschulschrift/Dissertation Buch
Sprache:	Englisch
Veröffentlicht:	Dresden TUDpress 2017
Schriftenreihe:	Schriftenreihe aus dem Institut für Strömungsmechanik 20
Schlagwörter:	LES > Strömung Kanalströmung Blasensäule Turbulente Strömung Direkte numerische Simulation Reynoldssche Gleichung Blasenströmung Fluss Strömungstechnik Turbulenzen Hochschulschrift
Links:	https://d-nb.info/1193194644/04 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=031670899&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
Umfang:	XII, 102 Seiten Illustrationen, Diagramme 22 cm
ISBN:	9783959081153 3959081154

Internformat

MARC


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Datensatz im Suchindex

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adam_text	VII NOMENCLATURE .............................................................................................................................. IX 1 INTRODUCTION ........................................................................................................................... 1 1.1 BACKGROUND AND MOTIVATION FOR THE THESIS ...................................................................... 1 1.2 OUTLINE OF THE THESIS ......................................................................................................... 3 2 PHYSICAL MODELLING FOR BUBBLY FLOWS .................................................................................. 5 2.1 EULER-EULER APPROACH ........................................................................................................ 5 2.2 MODELLING INTERFACIAL FORCES ............................................................................................ 5 2.3 TURBULENCE MODELLING .................................................................................................... 10 2.4 BUBBLE-INDUCED TURBULENCE ............................................................................................ 12 3 LARGE EDDY SIMULATION FOR DISPERSED BUBBLY FLOWS ......................................................... 15 3.1 DESCRIPTION OF METHOD EMPLOYED .................................................................................. 16 3.2 BUBBLE COLUMN WITH HOMOGENEOUS DISTRIBUTED GAS INLET .............................................. 18 3.2.1 EXPERIMENTAL DATA AND SIMULATION SETUP ................................................................ 18 3.2.2 TRANSIENT RESULTS .................................................................................................... 22 3.2.3 TIME-AVERAGED RESULTS ........................................................................................... 23 3.2.4 ANALYSIS OF SPECTRA ................................................................................................ 26 3.3 BUBBLE PLUMES ............................................................................................................... 28 3.3.1 EXPERIMENTAL DATA AND SIMULATION SETUP ............................................................... 28 3.3.2 TRANSIENT RESULTS .................................................................................................... 29 3.3.3 TIME-AVERAGED RESULTS ........................................................................................... 30 3.3.4 ANALYSIS OF SPECTRA ................................................................................................ 34 4 SCALE-ADAPTIVE SIMULATION OF A SQUARE BUBBLE COLUMN .................................................. 39 4.1 DESCRIPTION OF METHOD EMPLOYED ................................................................................. 39 4.2 SIMULATION OF THE BUBBLE PLUME .................................................................................... 41 4.2.1 EXPERIMENTAL DATA AND SIMULATION SETUP ............................................................... 41 4.2.2 TRANSIENT RESULTS .................................................................................................... 42 4.2.3 TIME-AVERAGED RESULTS ........................................................................................... 43 4.2.4 ANALYSIS OF SPECTRA ................................................................................................ 46 5 IMPROVED RANS MODEL BASED ON DNS DATA .................................................................. 49 5.1 DNS DATABASE ............................................................................................................... 50 5.2 ENERGY SPECTRA AND TIME SCALES ..................................................................................... 54 5.3 RANS MODELLING OF BUBBLY FLOW ................................................................................. 58 5.3.1 BUDGET OF THE TURBULENT KINETIC ENERGY .................................................................. 59 VIII 5.3.2 THE MODELLED ^-BUDGET AND A PRIORI TEST OF THE BIT TERM .................................... 61 5.3.3 TRANSPORT EQUATION FOR CO ........................................................................................ 63 5.4 MODEL PARAMETERS FOR THE DIFFERENT CASES ..................................................................... 63 5.4.1 COMPUTATIONAL PROCEDURE FOR EE-RANS ............................................................... 63 5.4.2 PROCEDURE FOR DETERMINATION OF MODEL COEFFICIENTS .............................................. 64 5.4.3 CLOSURE FOR CASE SMMANY ...................................................................................... 66 5.4.4 VARYING THE VOID FRACTION ....................................................................................... 68 5.4.5 VARYING THE BUBBLE SIZE .......................................................................................... 70 5.4.6 MODELLING OF THE BI-DISPERSE BUBBLY SWARM .......................................................... 72 5.5 PROPOSED NEW BIT MODEL .............................................................................................. 76 5.5.1 CORRELATIONS FOR C I & C .......................................................................................... 76 5.5.2 ASSESSMENT OF EXISTING BIT MODELS ...................................................................... 78 5.6 CRITICAL POINTS IN BIT MODELLING .................................................................................... 85 5.6.1 BIT MODELLING BASED ONLY ON ANALYSIS OF TKE BUDGET ........................................ 85 5.6.2 BIT MODELLING BASED ON FITTING TKE ..................................................................... 86 5.7 FIRST VALIDATION OF THE NEW BIT MODEL .......................................................................... 87 6 CONCLUSIONS AND DISCUSSION ................................................................................................ 91 BIBLIOGRAPHY ................................................................................................................................. 93
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physical	XII, 102 Seiten Illustrationen, Diagramme 22 cm
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publisher	TUDpress
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series	Schriftenreihe aus dem Institut für Strömungsmechanik
series2	Schriftenreihe aus dem Institut für Strömungsmechanik
spellingShingle	Ma, Tian 1985- A contribution to turbulence modelling in bubbly flows Schriftenreihe aus dem Institut für Strömungsmechanik LES Strömung (DE-588)4315616-2 gnd Kanalströmung (DE-588)4137410-1 gnd Blasensäule (DE-588)4007033-5 gnd Turbulente Strömung (DE-588)4117265-6 gnd Direkte numerische Simulation (DE-588)4494453-6 gnd Reynoldssche Gleichung (DE-588)4261715-7 gnd Blasenströmung (DE-588)4145826-6 gnd
subject_GND	(DE-588)4315616-2 (DE-588)4137410-1 (DE-588)4007033-5 (DE-588)4117265-6 (DE-588)4494453-6 (DE-588)4261715-7 (DE-588)4145826-6 (DE-588)4113937-9
title	A contribution to turbulence modelling in bubbly flows
title_auth	A contribution to turbulence modelling in bubbly flows
title_exact_search	A contribution to turbulence modelling in bubbly flows
title_full	A contribution to turbulence modelling in bubbly flows Tian Ma
title_fullStr	A contribution to turbulence modelling in bubbly flows Tian Ma
title_full_unstemmed	A contribution to turbulence modelling in bubbly flows Tian Ma
title_short	A contribution to turbulence modelling in bubbly flows
title_sort	a contribution to turbulence modelling in bubbly flows
topic	LES Strömung (DE-588)4315616-2 gnd Kanalströmung (DE-588)4137410-1 gnd Blasensäule (DE-588)4007033-5 gnd Turbulente Strömung (DE-588)4117265-6 gnd Direkte numerische Simulation (DE-588)4494453-6 gnd Reynoldssche Gleichung (DE-588)4261715-7 gnd Blasenströmung (DE-588)4145826-6 gnd
topic_facet	LES Strömung Kanalströmung Blasensäule Turbulente Strömung Direkte numerische Simulation Reynoldssche Gleichung Blasenströmung Hochschulschrift
url	https://d-nb.info/1193194644/04 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=031670899&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
volume_link	(DE-604)BV041992540
work_keys_str_mv	AT matian acontributiontoturbulencemodellinginbubblyflows

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