Highly-resolved numerical simulations of bed-load transport in a turbulent open-channel flow:
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Dresden
TUDpress
2015
|
| Schriftenreihe: | Schriftenreihe aus dem Institut für Strömungsmechanik
12 |
| Schlagworte: | |
| Online-Zugang: | Inhaltstext Inhaltsverzeichnis |
| Beschreibung: | XIX, 135 S. Ill., graph. Darst. 22 cm |
| ISBN: | 9783959080026 |
Internformat
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| 245 | 1 | 0 | |a Highly-resolved numerical simulations of bed-load transport in a turbulent open-channel flow |c Bernhard Vowinckel |
| 264 | 1 | |a Dresden |b TUDpress |c 2015 | |
| 300 | |a XIX, 135 S. |b Ill., graph. Darst. |c 22 cm | ||
| 336 | |b txt |2 rdacontent | ||
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| 490 | 1 | |a Schriftenreihe aus dem Institut für Strömungsmechanik |v 12 | |
| 502 | |a Zugl.: Dresden, Techn. Univ., Diss., 2014 | ||
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Datensatz im Suchindex
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CONTENTS
NOMENCLATURE XV
1 INTRODUCTION 1
1.1 BACKGROUND 1
1.2 EXPERIMENTAL EFFORTS 1
1.3 NUMERICAL EFFORTS 3
1.4 RESEARCH OBJECTIVES AND OVERVIEW 4
2 NUMERICAL METHOD 7
2.1 PRINCIPAL SETUP OF AN OPEN-CHANNEL FLOW 7
2.2 FLUID SOLVER 8
2.2.1 GOVERNING EQUATIONS 8
2.2.2 SPATIAL DISCRETIZATION 8
2.2.3 TIME INTEGRATION 9
2.2.4 BOUNDARY CONDITIONS 9
2.2.5 DRIVING THE CHANNEL FLOW 10
2.3 IMMERSED BOUNDARY METHOD 11
2.3.1 REPRESENTATION OF THE PARTICLE-FLUID INTERFACE 11
2.3.2 COMPUTATION OF PARTICLE MOTION 12
2.3.3 ENHANCED IBM 13
3 CHOICE OF COLLISION MODEL 15
3.1 INTRODUCTION 15
3.2 COLLISION MODELLING 16
3.2.1 STRUCTURE OF COLLISION MODELS 16
3.2.2 HARD-SPHERE MODEL 16
3.2.3 REPULSIVE POTENTIAL MODEL 17
3.2.4 ADAPTIVE COLLISION MODEL 18
3.3 COMPUATIONAL SETUP 21
3.3.1 DIMENSIONLESS PARAMETERS 21
3.3.2 CONFIGURATION WITH A SINGLE MOBILE PARTICLE 22
3.3.3 CONFIGURATION WITH MULTIPLE MOBILE PARTICLES 23
3.4 RESULTS FOR SINGLE MOBILE PARTICLES 25
3.4.1 CLASSIFICATION OF THE TYPES OF MOTION 25
3.4.2 JUMPING STATE 26
3.4.3 CREEPING STATE 27
3.5 RESULTS FOR MANY MOBILE PARTICLES 29
HTTP://D-NB.INFO/1071244086
XLL
CONTENTS
3.5.1 SAMPLING STRATEGY 29
3.5.2 FLOW FIELD STATISTICS FOR LIGHT PARTICLES 29
3.5.3 PARTICLE STATISTICS FOR LIGHT PARTICLES 30
3.5.4 IMPACT OF THE COLLISION MODEL FOR HEAVY PARTICLES COMPARED TO
LIGHT
PARTICLES 34
3.5.5 AVERAGE PARTICLE VELOCITY AND SHIELDS NUMBER 36
3.5.6 FLUID-WORKED STRUCTURES OF THE SEDIMENT 36
3.6 CONCLUDING REMARKS 37
4 MOMENTUM BALANCE IN FLOWS OVER MOBILE GRANULAR BEDS 39
4.1 INTRODUCTION 39
4.2 SIMULATION SCENARIOS AND KEY PARAMETERS 40
4.2.1 COMPUTATIONAL SETUP 40
4.2.2 SCENARIO WITH HEAVY PARTICLES 42
4.2.3 SCENARIO WITH LIGHT PARTICLES 43
4.3 DOUBLE AVERAGING METHODOLOGY AND ITS IMPLEMENTATION 43
4.3.1 DEFINITION OF AVERAGING OPERATORS 43
4.3.2 APPLICATION OF THE DAM TO THE NAVIER-STOKES EQUATIONS 47
4.4 PREPARATORY WORK 49
4.4.1 NUMERICAL ISSUES 49
4.4.2 MINIMAL SCHEMATIC EXAMPLE 50
4.4.3 SELECTION OF AVERAGING TIME 51
4.4.4 SELECTION OF SPATIAL AVERAGING DOMAIN 53
4.5 MOMENT FLUXES AND BALANCE WITHIN THE DOUBLE -AVERAGED FRAMEWORK 56
4.5.1 POROSITIES AND DOUBLE-AVERAGED VELOCITIES 56
4.5.2 MOMENTUM FLUXES 57
" 4.5.3 RATES OF CHANGE OF MOMENTUM 60
4.5.4 MOMENTUM BALANCE 62
4.5.5 SECONDARY CURRENTS 66
4.6 CONCLUSIONS 69
5 IMPACT OF MOBILITY AND SEDIMENT SUPPLY ON BED-LOAD TRANSPORT 71
5.1 INTRODUCTION 71
5.2 NUMERICAL SETUP 72
5.2.1 COMPUTATIONAL DOMAIN AND KEY PARAMETERS 72
5.2.2 COMPARABILITY TO EXPERIMENTAL SETUPS 75
5.3 FLUID-PARTICLE INTERACTION 77
5.3.1 PATTERN FORMATION 77
5.3.2 MODIFICATION OF FLUID PROPERTIES 79
5.3.3 MODIFICATION OF PARTICLE PROPERTIES 83
5.3.4 LENGTH SCALES OF PARTICLE CLUSTERS AND COHERENT FLUID STRUCTURES
. 86
5.4 CONCLUSIONS 92
6 INVESTIGATION OF FLOW EVENTS BY CONDITIONAL AVERAGING 93
6.1 INTRODUCTION 93
6.2 INCIPIENT MOTION 94
6.2.1 IDENTIFICATION OF EROSION EVENTS 94
6.2.2 ENSEMBLE AVERAGED VELOCITY FIELDS 97
CONTENTS XIII
6.2.3 PARTICLE DIFFUSION 100
6.3 FLOW AROUND DUNE-LIKE CLUSTERS 102
6.3.1 CLUSTER TRACKING 102
6.3.2 CONDITIONAL AVERAGING AND MEAN SHAPE OF PARTICLE CLUSTER 105
6.3.3 TIME-AVERAGED FLOW FIELDS 107
6.4 CONCLUSIONS I ILL
7 SUMMARY AND OUTLOOK 113
A BUCKINGHAM II-THEOREM 127
B PARALLELISATION AND PERFORMANCE 129
C DETERMINATION OF THE INITIALISATION PERIOD 133 |
| any_adam_object | 1 |
| author | Vowinckel, Bernhard 1982- |
| author_GND | (DE-588)1070019216 |
| author_facet | Vowinckel, Bernhard 1982- |
| author_role | aut |
| author_sort | Vowinckel, Bernhard 1982- |
| author_variant | b v bv |
| building | Verbundindex |
| bvnumber | BV042677233 |
| classification_rvk | UF 4600 |
| ctrlnum | (OCoLC)910327441 (DE-599)DNB1071244086 |
| dewey-full | 620.10640151864 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
| dewey-ones | 620 - Engineering and allied operations |
| dewey-raw | 620.10640151864 |
| dewey-search | 620.10640151864 |
| dewey-sort | 3620.10640151864 |
| dewey-tens | 620 - Engineering and allied operations |
| discipline | Maschinenbau / Maschinenwesen Physik |
| format | Thesis Book |
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| id | DE-604.BV042677233 |
| illustrated | Illustrated |
| indexdate | 2024-09-10T01:47:49Z |
| institution | BVB |
| isbn | 9783959080026 |
| language | English |
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| physical | XIX, 135 S. Ill., graph. Darst. 22 cm |
| publishDate | 2015 |
| publishDateSearch | 2015 |
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| publisher | TUDpress |
| record_format | marc |
| series | Schriftenreihe aus dem Institut für Strömungsmechanik |
| series2 | Schriftenreihe aus dem Institut für Strömungsmechanik |
| spelling | Vowinckel, Bernhard 1982- Verfasser (DE-588)1070019216 aut Highly-resolved numerical simulations of bed-load transport in a turbulent open-channel flow Bernhard Vowinckel Dresden TUDpress 2015 XIX, 135 S. Ill., graph. Darst. 22 cm txt rdacontent n rdamedia nc rdacarrier Schriftenreihe aus dem Institut für Strömungsmechanik 12 Zugl.: Dresden, Techn. Univ., Diss., 2014 Feststofftransport (DE-588)4253149-4 gnd rswk-swf Gerinneströmung (DE-588)4156834-5 gnd rswk-swf Offenes Gerinne (DE-588)4172491-4 gnd rswk-swf Direkte numerische Simulation (DE-588)4494453-6 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Offenes Gerinne (DE-588)4172491-4 s Gerinneströmung (DE-588)4156834-5 s Feststofftransport (DE-588)4253149-4 s Direkte numerische Simulation (DE-588)4494453-6 s DE-604 Schriftenreihe aus dem Institut für Strömungsmechanik 12 (DE-604)BV041992540 12 X:MVB text/html http://deposit.dnb.de/cgi-bin/dokserv?id=5261991&prov=M&dok_var=1&dok_ext=htm Inhaltstext DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028109149&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Vowinckel, Bernhard 1982- Highly-resolved numerical simulations of bed-load transport in a turbulent open-channel flow Schriftenreihe aus dem Institut für Strömungsmechanik Feststofftransport (DE-588)4253149-4 gnd Gerinneströmung (DE-588)4156834-5 gnd Offenes Gerinne (DE-588)4172491-4 gnd Direkte numerische Simulation (DE-588)4494453-6 gnd |
| subject_GND | (DE-588)4253149-4 (DE-588)4156834-5 (DE-588)4172491-4 (DE-588)4494453-6 (DE-588)4113937-9 |
| title | Highly-resolved numerical simulations of bed-load transport in a turbulent open-channel flow |
| title_auth | Highly-resolved numerical simulations of bed-load transport in a turbulent open-channel flow |
| title_exact_search | Highly-resolved numerical simulations of bed-load transport in a turbulent open-channel flow |
| title_full | Highly-resolved numerical simulations of bed-load transport in a turbulent open-channel flow Bernhard Vowinckel |
| title_fullStr | Highly-resolved numerical simulations of bed-load transport in a turbulent open-channel flow Bernhard Vowinckel |
| title_full_unstemmed | Highly-resolved numerical simulations of bed-load transport in a turbulent open-channel flow Bernhard Vowinckel |
| title_short | Highly-resolved numerical simulations of bed-load transport in a turbulent open-channel flow |
| title_sort | highly resolved numerical simulations of bed load transport in a turbulent open channel flow |
| topic | Feststofftransport (DE-588)4253149-4 gnd Gerinneströmung (DE-588)4156834-5 gnd Offenes Gerinne (DE-588)4172491-4 gnd Direkte numerische Simulation (DE-588)4494453-6 gnd |
| topic_facet | Feststofftransport Gerinneströmung Offenes Gerinne Direkte numerische Simulation Hochschulschrift |
| url | http://deposit.dnb.de/cgi-bin/dokserv?id=5261991&prov=M&dok_var=1&dok_ext=htm http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028109149&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV041992540 |
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