Here planar velocity data and selected velocity vector maps are available for viewing and/or download. Data are available for a zero-pressure gradient flat plate turbulent boundary layer at two Reynolds numbers: Req = 1015 and 7705. 2-dimensional velocity vectors are obtained in the streamwise/wall-normal plane, with field of view approximately 3d in x and over d in y. Relevant flow parameters are available for viewing or download in pdf format below. Approximately 50 realizations are taken at each Reynolds number.
Analysis and interpretation of the data is presented in the following references. These also provide further details of the flow facility, image acquisition, and interrogation procedure. The labels (in bold) attached to each reference are used below to identify images which are presented as figures in the papers.
View or download (pdf format) a table of relevant flow parameters here.
Images
For several realizations of particular interest at each Reynolds number velocity vector fields are available for viewing as “gif” images. Galilean decomposition is used in visualizing the velocity fields as discussed in AMT00; each field is plotted using 2 convection velocities (Uc). Some velocities are selected to reveal outer-region structures, and others near-wall structures, in addition to log-layer structures. Each image is plotted with two different magnifications. One is chosen so the viewed image will approximately fit on a single screen or page (“Page view”). The other is chosen to create an image roughly twice as large, so the viewer may scan the details of the flow more carefully (“Wide view”).The realizations are selected to provide examples of a variety of structures observed in the data, including the vortex packets/ramp-like structures discussed in the above references, although common elements appear in each realization (hairpin vortex signatures, packets). It is also interesting to observe the range of scales within each realization, and the viewer will find examples of the “hierarchical” character of the structure. The page view images may also be downloaded in postscript format for printing.
| High Reynolds number (Req = 7705) | ||||
| Realization | Velocity vectors, Uc1 Page view |
Velocity vectors, Uc1 Wide view |
Velocity vectors, Uc2 Page view |
Velocity vectors, Uc2 Wide view |
| High01 | High01Uc1 View --- Download |
High01Uc1wide View |
High01Uc2 View --- Download |
High01Uc2wide View |
| High02 | High02Uc1 View --- Download |
High02Uc1wide View |
High02Uc2 View --- Download |
High02Uc2wide View |
| High04 | High04Uc1 View --- Download |
High04Uc1wide View |
High04Uc2 View --- Download |
High04Uc2wide View |
| High05 | High05Uc1 View --- Download |
High05Uc1wide View |
High05Uc2 View --- Download |
High05Uc2wide View |
| High09 (AMT00 Fig. 19) |
High09Uc1 View --- Download |
High09Uc1wide View |
High09Uc2 View --- Download |
High09Uc2wide View |
| High13 | High13Uc1 View --- Download |
High13Uc1wide View |
High13Uc2 View --- Download |
High13Uc2wide View |
| High16 (AMT00 Fig. 20) |
High16Uc1 View --- Download |
High16Uc1wide View |
High16Uc2 View --- Download |
High16Uc2wide View |
| High19 | High19Uc1 View --- Download |
High19Uc1wide View |
High19Uc2 View --- Download |
High19Uc2wide View |
| High20 (AMT00 Fig. 23) |
High20Uc1 View --- Download |
High20Uc1wide View |
High20Uc2 View --- Download |
High20Uc2wide View |
| High31 (TAB98 Fig. 5) |
High31Uc1 View --- Download |
High31Uc1wide View |
High31Uc2 View --- Download |
High31Uc2wide View |
| High43 | High43Uc1 View --- Download |
High43Uc1wide View |
High43Uc2 View --- Download |
High43Uc2wide View |
| Low Reynolds number (Req = 1015) | ||||
| Realization | Velocity vectors, Uc1 Page view |
Velocity vectors, Uc1 Wide view |
Velocity vectors, Uc2 Page view |
Velocity vectors, Uc2 Wide view |
| Low04 | Low04Uc1 View --- Download |
Low04Uc1wide View |
Low04Uc2 View --- Download |
Low04Uc2wide View |
| Low09 | Low09Uc1 View --- Download |
Low09Uc1wide View |
Low09Uc2 View --- Download |
Low09Uc2wide View |
| Low11 (TAB98 Fig. 6) |
Low11Uc1 View --- Download |
Low11Uc1wide View |
Low11Uc2 View --- Download |
Low11Uc2wide View |
| Low23 | Low23Uc1 View --- Download |
Low23Uc1wide View |
Low23Uc2 View --- Download |
Low23Uc2wide View |
| Low24 | Low24Uc1 View --- Download |
Low24Uc1wide View |
Low24Uc2 View --- Download |
Low24Uc2wide View |
| Low28 | Low28Uc1 View --- Download |
Low28Uc1wide View |
Low28Uc2 View --- Download |
Low28Uc2wide View |
| Low32 | Low32Uc1 View --- Download |
Low32Uc1wide View |
Low32Uc2 View --- Download |
Low32Uc2wide View |
| Low39 | Low39Uc1 View --- Download |
Low39Uc1wide View |
Low39Uc2 View --- Download |
Low39Uc2wide View |
| Low40 | Low40Uc1 View --- Download |
Low40Uc1wide View |
Low40Uc2 View --- Download |
Low40Uc2wide View |
| Low52 | Low52Uc1 View --- Download |
Low52Uc1wide View |
Low52Uc2 View --- Download |
Low52Uc2wide View |
Data
The data are provided in a simple four-column ascii format. Each row of the data represents one velocity vector. The first two columns correspond to streamwise position x and wall-normal position y respectively, in physical units (mm). The third and fourth columns correspond to streamwise and wall-normal velocity u and v respectively, again in physical units (m/s). The units may be made dimensionless using the flow parameters file available above. The data files also include a one-line header so they can be immediately read into Tecplot. A few images interrogated poorly and were not included in the dataset.Individual high Reynolds number realizations may be downloaded from the table below, or the entire dataset may be downloaded in a zipped package here.
| High Reynolds number (Req = 7705) | ||||
| High01 | High02 | High03 | High04 | High05 |
| High06 | High07 | High08 | High09 1 | High10 |
| High11 | High12 | High13 | High14 | High15 |
| High16 2 | High17 | High18 | High19 | High20 3 |
| High21 | High22 | High23 | High24 | High25 |
| High26 | High27 | High28 | High29 | High30 |
| High31 4 | High32 | High33 | High34 | High35 |
| High36 | High37 | High38 | High39 | High41 |
| High42 | High43 | High44 | High45 | High46 |
| High47 | High48 | High49 | High50 | High51 |
Individual low Reynolds number realizations may be downloaded from the table below, or the entire dataset may be downloaded in a zipped package here.
| Low Reynolds number (Req = 1015) | ||||
| Low01 | Low02 | Low03 | Low04 | Low05 |
| Low06 | Low07 5 | Low08 | Low09 | Low10 |
| Low11 6 | Low12 | Low13 | Low14 | Low15 |
| Low21 | Low22 | Low23 | Low24 | Low25 |
| Low26 | Low28 | Low29 | Low30 | Low32 |
| Low33 | Low34 | Low35 | Low36 | Low37 |
| Low38 | Low39 | Low40 | Low41 | Low42 |
| Low43 | Low45 | Low46 | Low47 | Low48 |
| Low49 | Low50 | Low51 | Low52 | |
Please direct any questions, comments, or suggestions to Professor Ronald Adrian (r-adrian@uiuc.edu) or Chris Tomkins (tomkins@uiuc.edu). This work was supported by the Office of Naval Research under Grant No. N0001-97-1-01091.
