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f | 1 | { | f | 1 | { |
2 | "author": "Stroh, A.", | 2 | "author": "Stroh, A.", | ||
3 | "author_email": "", | 3 | "author_email": "", | ||
4 | "creator_user_id": "17755db4-395a-4b3b-ac09-e8e3484ca700", | 4 | "creator_user_id": "17755db4-395a-4b3b-ac09-e8e3484ca700", | ||
5 | "doi": "10.35097/1199", | 5 | "doi": "10.35097/1199", | ||
6 | "doi_date_published": "2023", | 6 | "doi_date_published": "2023", | ||
7 | "doi_publisher": "", | 7 | "doi_publisher": "", | ||
8 | "doi_status": "True", | 8 | "doi_status": "True", | ||
9 | "extra_authors": [ | 9 | "extra_authors": [ | ||
10 | { | 10 | { | ||
11 | "extra_author": "Sch\u00e4fer, K.", | 11 | "extra_author": "Sch\u00e4fer, K.", | ||
12 | "orcid": "0000-0002-1704-8233" | 12 | "orcid": "0000-0002-1704-8233" | ||
13 | }, | 13 | }, | ||
14 | { | 14 | { | ||
15 | "extra_author": "Frohnapfel, B.", | 15 | "extra_author": "Frohnapfel, B.", | ||
16 | "orcid": "" | 16 | "orcid": "" | ||
17 | }, | 17 | }, | ||
18 | { | 18 | { | ||
19 | "extra_author": "Forooghi, P.", | 19 | "extra_author": "Forooghi, P.", | ||
20 | "orcid": "" | 20 | "orcid": "" | ||
21 | } | 21 | } | ||
22 | ], | 22 | ], | ||
23 | "groups": [], | 23 | "groups": [], | ||
24 | "id": "01e906df-4af6-4740-8985-e9d10afdca1e", | 24 | "id": "01e906df-4af6-4740-8985-e9d10afdca1e", | ||
25 | "isopen": false, | 25 | "isopen": false, | ||
26 | "license_id": "CC BY-NC 4.0 Attribution-NonCommercial", | 26 | "license_id": "CC BY-NC 4.0 Attribution-NonCommercial", | ||
27 | "license_title": "CC BY-NC 4.0 Attribution-NonCommercial", | 27 | "license_title": "CC BY-NC 4.0 Attribution-NonCommercial", | ||
28 | "metadata_created": "2023-08-04T08:50:16.202444", | 28 | "metadata_created": "2023-08-04T08:50:16.202444", | ||
t | 29 | "metadata_modified": "2023-08-04T09:04:02.888298", | t | 29 | "metadata_modified": "2023-08-04T09:28:56.583421", |
30 | "name": "rdr-doi-10-35097-1199", | 30 | "name": "rdr-doi-10-35097-1199", | ||
31 | "notes": "TechnicalRemarks: These files contain the data used in the | 31 | "notes": "TechnicalRemarks: These files contain the data used in the | ||
32 | publication: \r\n\r\n\u201cRearrangement of secondary flow over | 32 | publication: \r\n\r\n\u201cRearrangement of secondary flow over | ||
33 | spanwise heterogeneous roughness\u201d\r\nA. Stroh, K. Sch\u00e4fer, | 33 | spanwise heterogeneous roughness\u201d\r\nA. Stroh, K. Sch\u00e4fer, | ||
34 | B. Frohnapfel and P. Forooghi\r\npublished in Journal of Fluid | 34 | B. Frohnapfel and P. Forooghi\r\npublished in Journal of Fluid | ||
35 | Mechanics, 2019.\r\n(DOI: | 35 | Mechanics, 2019.\r\n(DOI: | ||
36 | 10.1017/jfm.2019.1030)\r\n\r\nAbstract:\r\n\r\nTurbulent flow over a | 36 | 10.1017/jfm.2019.1030)\r\n\r\nAbstract:\r\n\r\nTurbulent flow over a | ||
37 | surface with streamwise-elongated rough and smooth stripes is studied | 37 | surface with streamwise-elongated rough and smooth stripes is studied | ||
38 | by means of direct numerical simulation (DNS) in a periodic plane open | 38 | by means of direct numerical simulation (DNS) in a periodic plane open | ||
39 | channel with fully resolved roughness. The goal is to understand how | 39 | channel with fully resolved roughness. The goal is to understand how | ||
40 | the mean height of roughness affects the characteristics of the | 40 | the mean height of roughness affects the characteristics of the | ||
41 | secondary flow formed above a spanwise-heterogeneous rough surface. To | 41 | secondary flow formed above a spanwise-heterogeneous rough surface. To | ||
42 | this end, while the statistical properties of roughness texture as | 42 | this end, while the statistical properties of roughness texture as | ||
43 | well as the width and spacing of the rough stripes are kept constant, | 43 | well as the width and spacing of the rough stripes are kept constant, | ||
44 | the elevation of the smooth stripes is systematically varied in | 44 | the elevation of the smooth stripes is systematically varied in | ||
45 | different simulation cases. Utilizing this variation three | 45 | different simulation cases. Utilizing this variation three | ||
46 | configurations representing protruding, recessed and an intermediate | 46 | configurations representing protruding, recessed and an intermediate | ||
47 | type of roughness are analysed. In all cases secondary flows are | 47 | type of roughness are analysed. In all cases secondary flows are | ||
48 | present and the skin friction coefficients calculated for all the | 48 | present and the skin friction coefficients calculated for all the | ||
49 | heterogeneous rough surfaces are meaningfully larger than what would | 49 | heterogeneous rough surfaces are meaningfully larger than what would | ||
50 | result from the area-weighted average of those of homogeneous smooth | 50 | result from the area-weighted average of those of homogeneous smooth | ||
51 | and rough surfaces. This drag increase appears to be linked to the | 51 | and rough surfaces. This drag increase appears to be linked to the | ||
52 | strength of the secondary flow. The rotational direction of the | 52 | strength of the secondary flow. The rotational direction of the | ||
53 | secondary motion is shown to depend on the relative surface elevation. | 53 | secondary motion is shown to depend on the relative surface elevation. | ||
54 | The present results suggest that this rearrangement of the secondary | 54 | The present results suggest that this rearrangement of the secondary | ||
55 | flow is linked to the spatial distribution of the spanwise-wall-normal | 55 | flow is linked to the spatial distribution of the spanwise-wall-normal | ||
56 | Reynolds stress component which carries opposing signs for protruding | 56 | Reynolds stress component which carries opposing signs for protruding | ||
57 | and recessed roughness.\r\n\r\nNumerical Details:\r\n\r\nThe carried | 57 | and recessed roughness.\r\n\r\nNumerical Details:\r\n\r\nThe carried | ||
58 | out DNS is based on a pseudo-spectral solver for incompressible | 58 | out DNS is based on a pseudo-spectral solver for incompressible | ||
59 | boundary layer flows developed at KTH/Stockholm. The Navier-Stokes | 59 | boundary layer flows developed at KTH/Stockholm. The Navier-Stokes | ||
60 | equations are numerically integrated using the velocity-vorticity | 60 | equations are numerically integrated using the velocity-vorticity | ||
61 | formulation by a spectral method with Fourier decomposition in the | 61 | formulation by a spectral method with Fourier decomposition in the | ||
62 | horizontal directions and Chebyshev discretization in the wall-normal | 62 | horizontal directions and Chebyshev discretization in the wall-normal | ||
63 | direction. For temporal advancement, the convection and viscous terms | 63 | direction. For temporal advancement, the convection and viscous terms | ||
64 | are discretized using the 3rd order Runge-Kutta and Crank-Nicolson | 64 | are discretized using the 3rd order Runge-Kutta and Crank-Nicolson | ||
65 | methods, respectively. The simulation domain represents an open | 65 | methods, respectively. The simulation domain represents an open | ||
66 | turbulent channel flow with periodic boundary conditions applied in | 66 | turbulent channel flow with periodic boundary conditions applied in | ||
67 | streamwise and spanwise directions, while the wall-normal extension of | 67 | streamwise and spanwise directions, while the wall-normal extension of | ||
68 | the domain is bounded by no-slip boundary conditions at the lower | 68 | the domain is bounded by no-slip boundary conditions at the lower | ||
69 | domain wall (y = 0) and symmetry boundary conditions (v = 0, | 69 | domain wall (y = 0) and symmetry boundary conditions (v = 0, | ||
70 | \u2202u/\u2202y = \u2202w/\u2202y = 0) at the upper boundary (y = | 70 | \u2202u/\u2202y = \u2202w/\u2202y = 0) at the upper boundary (y = | ||
71 | \u03b4). The flow is driven by a prescribed constant pressure gradient | 71 | \u03b4). The flow is driven by a prescribed constant pressure gradient | ||
72 | (CPG). The friction Reynolds number for the present case is fixed to | 72 | (CPG). The friction Reynolds number for the present case is fixed to | ||
73 | Re_\u03c4 = 500.\r\n\r\nSimulation configuration\r\n- Grid nodes: Nx x | 73 | Re_\u03c4 = 500.\r\n\r\nSimulation configuration\r\n- Grid nodes: Nx x | ||
74 | Ny x Nz = 768 \u00d7 301 \u00d7 384\r\n- Domain size: Lx x Ly x Lz = | 74 | Ny x Nz = 768 \u00d7 301 \u00d7 384\r\n- Domain size: Lx x Ly x Lz = | ||
75 | 8\u03b4 \u00d7 \u03b4 \u00d7 4\u03b4\r\n- Resolution: \u2206x+=5.2, | 75 | 8\u03b4 \u00d7 \u03b4 \u00d7 4\u03b4\r\n- Resolution: \u2206x+=5.2, | ||
76 | \u2206y_min+=0.014, \u2206y_max+=2.6, \u2206z+ = 5.2\r\n\r\nThe | 76 | \u2206y_min+=0.014, \u2206y_max+=2.6, \u2206z+ = 5.2\r\n\r\nThe | ||
77 | surface structure is introduced through an immersed boundary method | 77 | surface structure is introduced through an immersed boundary method | ||
78 | (IBM) based on the method proposed by Goldstein et al. (1993) and is | 78 | (IBM) based on the method proposed by Goldstein et al. (1993) and is | ||
79 | essentially a proportional controller which imposes zero velocity in | 79 | essentially a proportional controller which imposes zero velocity in | ||
80 | the solid region of the numerical domain. The structure is placed on | 80 | the solid region of the numerical domain. The structure is placed on | ||
81 | the lower domain wall in such a way that the surface height H of the | 81 | the lower domain wall in such a way that the surface height H of the | ||
82 | largest raised surface elements is given by H/\u03b4 = | 82 | largest raised surface elements is given by H/\u03b4 = | ||
83 | 10.2%.\r\n\r\nData Files:\r\n\r\nThe data files are saved and labeled | 83 | 10.2%.\r\n\r\nData Files:\r\n\r\nThe data files are saved and labeled | ||
84 | corresponding to the figure in the manuscript in *.mat files. Each | 84 | corresponding to the figure in the manuscript in *.mat files. Each | ||
85 | file contains MATLAB data consisting of the plotted quantities and | 85 | file contains MATLAB data consisting of the plotted quantities and | ||
86 | corresponding coordinates. The data is non-dimensionalized as shown in | 86 | corresponding coordinates. The data is non-dimensionalized as shown in | ||
87 | the manuscript figures utilizing friction velocity u_\u03c4, viscous | 87 | the manuscript figures utilizing friction velocity u_\u03c4, viscous | ||
88 | lengthscale \u03b4_\u03bd or bulk mean velocity U_b and effective | 88 | lengthscale \u03b4_\u03bd or bulk mean velocity U_b and effective | ||
89 | domain height \u03b4_eff.\r\n\r\nA matlab script | 89 | domain height \u03b4_eff.\r\n\r\nA matlab script | ||
90 | \u201cplot_figures.m\u201d provides the code, which loads the data and | 90 | \u201cplot_figures.m\u201d provides the code, which loads the data and | ||
91 | plots it in the same way as it has been done in the manuscript. | 91 | plots it in the same way as it has been done in the manuscript. | ||
92 | \u201cheight_distributions.mat\u201d contains the original roughness | 92 | \u201cheight_distributions.mat\u201d contains the original roughness | ||
93 | distributions utilized in the considered simulations. The files can be | 93 | distributions utilized in the considered simulations. The files can be | ||
94 | also loaded and plotted using | 94 | also loaded and plotted using | ||
95 | \u201cplot_figures.m\u201d\r\n\r\n3-dimensional instantaneous snapshot | 95 | \u201cplot_figures.m\u201d\r\n\r\n3-dimensional instantaneous snapshot | ||
96 | and time series of velocity fields is available upon request | 96 | and time series of velocity fields is available upon request | ||
97 | (alexander.stroh@kit.edu).\r\n\r\nReference: \r\n\r\nPlease provide a | 97 | (alexander.stroh@kit.edu).\r\n\r\nReference: \r\n\r\nPlease provide a | ||
98 | reference to the article above when using this data.\r\nPlease direct | 98 | reference to the article above when using this data.\r\nPlease direct | ||
99 | questions regarding numerical setup/data to Alexander Stroh | 99 | questions regarding numerical setup/data to Alexander Stroh | ||
100 | \r\n\r\nLicence: Creative Commons: Attribution 4.0 International (CC | 100 | \r\n\r\nLicence: Creative Commons: Attribution 4.0 International (CC | ||
101 | BY 4.0) https://creativecommons.org/licenses/by/4.0/\r\n\r\nNovember, | 101 | BY 4.0) https://creativecommons.org/licenses/by/4.0/\r\n\r\nNovember, | ||
102 | 2019", | 102 | 2019", | ||
103 | "num_resources": 0, | 103 | "num_resources": 0, | ||
104 | "num_tags": 0, | 104 | "num_tags": 0, | ||
105 | "orcid": "", | 105 | "orcid": "", | ||
106 | "organization": { | 106 | "organization": { | ||
107 | "approval_status": "approved", | 107 | "approval_status": "approved", | ||
108 | "created": "2023-01-12T13:30:23.238233", | 108 | "created": "2023-01-12T13:30:23.238233", | ||
109 | "description": "RADAR (Research Data Repository) is a | 109 | "description": "RADAR (Research Data Repository) is a | ||
110 | cross-disciplinary repository for archiving and publishing research | 110 | cross-disciplinary repository for archiving and publishing research | ||
111 | data from completed scientific studies and projects. The focus is on | 111 | data from completed scientific studies and projects. The focus is on | ||
112 | research data from subjects that do not yet have their own | 112 | research data from subjects that do not yet have their own | ||
113 | discipline-specific infrastructures for research data management. ", | 113 | discipline-specific infrastructures for research data management. ", | ||
114 | "id": "013c89a9-383c-4200-8baa-0f78bf1d91f9", | 114 | "id": "013c89a9-383c-4200-8baa-0f78bf1d91f9", | ||
115 | "image_url": "radar-logo.svg", | 115 | "image_url": "radar-logo.svg", | ||
116 | "is_organization": true, | 116 | "is_organization": true, | ||
117 | "name": "radar", | 117 | "name": "radar", | ||
118 | "state": "active", | 118 | "state": "active", | ||
119 | "title": "RADAR", | 119 | "title": "RADAR", | ||
120 | "type": "organization" | 120 | "type": "organization" | ||
121 | }, | 121 | }, | ||
122 | "owner_org": "013c89a9-383c-4200-8baa-0f78bf1d91f9", | 122 | "owner_org": "013c89a9-383c-4200-8baa-0f78bf1d91f9", | ||
123 | "private": false, | 123 | "private": false, | ||
124 | "production_year": "2019", | 124 | "production_year": "2019", | ||
125 | "publication_year": "2023", | 125 | "publication_year": "2023", | ||
126 | "publishers": [ | 126 | "publishers": [ | ||
127 | { | 127 | { | ||
128 | "publisher": "Karlsruhe Institute of Technology" | 128 | "publisher": "Karlsruhe Institute of Technology" | ||
129 | } | 129 | } | ||
130 | ], | 130 | ], | ||
131 | "relationships_as_object": [], | 131 | "relationships_as_object": [], | ||
132 | "relationships_as_subject": [], | 132 | "relationships_as_subject": [], | ||
133 | "repository_name": "RADAR (Research Data Repository)", | 133 | "repository_name": "RADAR (Research Data Repository)", | ||
134 | "resources": [], | 134 | "resources": [], | ||
135 | "services_used_list": "", | 135 | "services_used_list": "", | ||
136 | "source_metadata_created": "2023", | 136 | "source_metadata_created": "2023", | ||
137 | "source_metadata_modified": "", | 137 | "source_metadata_modified": "", | ||
138 | "state": "active", | 138 | "state": "active", | ||
139 | "subject_areas": [ | 139 | "subject_areas": [ | ||
140 | { | 140 | { | ||
141 | "subject_area_additional": "", | 141 | "subject_area_additional": "", | ||
142 | "subject_area_name": "Engineering" | 142 | "subject_area_name": "Engineering" | ||
143 | } | 143 | } | ||
144 | ], | 144 | ], | ||
145 | "tags": [], | 145 | "tags": [], | ||
146 | "title": "Dataset for rearrangement of secondary flow over spanwise | 146 | "title": "Dataset for rearrangement of secondary flow over spanwise | ||
147 | heterogeneous roughness", | 147 | heterogeneous roughness", | ||
148 | "type": "vdataset", | 148 | "type": "vdataset", | ||
149 | "url": "https://doi.org/10.35097/1199" | 149 | "url": "https://doi.org/10.35097/1199" | ||
150 | } | 150 | } |