Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Aerodynamics of Buildings (1976)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 8 (1976), S. 75-106 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.08.010176.000451
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Streaming Potential Fluctuation around a Cylinder in Water (1970)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 9 (1970), S. 211-216 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i160034a004
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A flow visualization technique for low-speed wind-tunnel studies (1987)
    Springer
    Experiments in fluids 5 (1987), S. 212-214 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The paper describes a flow visualization technique (direct injection method) used in low-speed wind-tunnel studies. Mixture of titanium tetrachloride and carbon tetrachloride is used to produce closely spaced parallel streaklines of white smoke of long duration. The technique is described in detail and representative photographs of various flow patterns are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00298465
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Problems of atmospheric shear flows and their laboratory simulation (1970)
    Springer
    Boundary layer meteorology 1 (1970), S. 40-60 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Shear flows generated by movement of the atmosphere near the earth's surface are accompanied by complexities not ordinarily encountered in the treatment of turbulent boundary layers. Problems arising from the following physical features are considered: (1) thermal stratification; (2) surface roughness in the form of forests and cities; (3) non-uniformity of surface roughness and/or temperature (leading to 3-dimensional turbulent boundary layers); (4) surface irregularities in the form of hilly and mountainous topography. The complex nature of atmospheric shear flows has stimulated efforts to study their characteristics in the laboratory under controlled conditions. Accordingly, questions of similarity between the laboratory and the atmospheric flows for both mean and turbulent quantities arise. Similarity criteria, or appropriate scaling relationships, are discussed. Wind tunnels designed for investigations related to atmospheric shear flows are described. These facilities are shown to have a capability for simulating such flows for a wide range of the physical features listed above.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193903
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Flow over high roughness elements (1971)
    Springer
    Boundary layer meteorology 1 (1971), S. 321-344 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The mean velocity and longitudinal turbulence-intensity distributions inside the zone of and above high roughness elements were investigated experimentally. This was accomplished by using a model forest canopy. The results indicate that the flow may be divided into transition and fully-developed flow regions, followed by a short adjustment distance near the downstream terminus of the rough boundary. The transition region has a strong effect on the flow characteristics within and above the layer of roughness elements. Generally, a similar qualitative variation for both velocity and turbulence was found inside and above the roughness zone, whose influence extends to more than three times the roughness height. Investigation of the modified universal logarithmic law for describing the velocity variation above the roughness zone revealed that both of the so-called similarity parameters, i.e., friction velocity and roughness length, are not local constants. On the contrary, for a given flow and local conditions they vary drastically with height. It is suspected that this is due to the fact that the classical assumption of constant shear stress throughout the boundary layer or significant portions of it is not satisfied in the case of roughness elements many times greater in height than the thickness of the viscous wall zone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02186035
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Fractal aspects of integrated concentration fluctuations (1993)
    Springer
    Boundary layer meteorology 62 (1993), S. 291-302 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Time series of vertically integrated concentrations (VIC) across neutrally buoyant plumes are used to study the fractal and multifractal characteristics of passive scalar fluctuations in turbulent flow fields. Here, the multifractal analysis is based on a novel definition of the singularity spectrum-F(α) of the time records. Approximations for quantities such as the fractal dimension and the spectral exponent are derived as functions ofF(α) and are compared with the experimental results. Among other things, we show that VIC records are characterized by two typical subdomains. One domain, which is related to integrated concentration fluctuations, is a subfractal process; whereas the second one, which is directly related to the concentration fluctuations, is a fractal process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00705560
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Mean temperature and mean concentration distributions over a physically modelled three-dimensional heat island for different stability conditions (1975)
    Springer
    Boundary layer meteorology 9 (1975), S. 427-440 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Results of flow visualization, and the mean temperature measurements over a physically modelled three-dimensional heat island in a wind tunnel capable of simulating stratified atmospheric boundary layers are presented. Concentration measurements of Kr85 released from an upwind two-dimensional continuous line source show good correlation with flow visualization and mean temperature distributions. The results indicate the unique features of three-dimensional flow over a heat island - lateral low-level convergence, upward vertical motions, and upper-level horizontal divergence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223392
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Wind Tunnel simulation of diffusion in a convective boundary layer (1984)
    Springer
    Boundary layer meteorology 30 (1984), S. 431-455 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: A study of turbulent dispersion of passive tracers in unstable boundary layers, conducted in the Meteorological Wind Tunnel of the Fluid Dynamics and Diffusion Laboratory at Colorado State University, is described. The measured mean and turbulent velocities are found to be similar to those measured in atmospheric convective boundary layers. The diffusion pattern, from ground-level and elevated sources over both a smooth floor and a rough floor, is found to be the same as that measured in the water-tank experiments of Deardorff and Willis (1975) and in numerical models. The measurements show an initial rapid descent of plumes from elevated sources and a subsequent plume rise at t* 〉 0.5 h/w*. Ground-level concentrations from elevated sources are found to be larger, at certain distances from the source, than those from a ground-level source of equal strength. The measurements of the cross-wind spread Σv are in agreement with the Prairie Grass measurements and confirm earlier predictions that the initial cross-wind spread for ground-level sources is larger than that for elevated sources.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00121965
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Physical modelling of flow and dispersion over complex terrain (1984)
    Springer
    Boundary layer meteorology 30 (1984), S. 261-292 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Atmospheric motion and dispersion over topography characterized by irregular (or regular) hill-valley or mountain-valley distributions are strongly dependent upon three general sets of variables. These are variables that describe topographic geometry, synoptic-scale winds and surface-air temperature distributions. In addition, pollutant concentration distributions also depend upon location and physical characteristics of the pollutant source. Overall fluid-flow complexity and variability from site to site have stimulated the development and use of physical modelling for determination of flow and dispersion in many wind-engineering applications. Models with length scales as small as 1:12,000 have been placed in boundary-layer wind tunnels to study flows in which forced convection by synoptic winds is of primary significance. Flows driven primarily by forces arising from temperature differences (gravitational or free convection) have been investigated by small-scale physical models placed in an isolated space (gravitational convection chamber). Similarity criteria and facilities for both forced and gravitational-convection flow studies are discussed. Forced-convection modelling is illustrated by application to dispersion of air pollutants by unstable flow near a paper mill in the state of Maryland and by stable flow over Point Arguello, California. Gravitational-convection modelling is demonstrated by a study of drainage flow and pollutant transport from a proposed mining operation in the Rocky Mountains of Colorado. Other studies in which field data are available for comparison with model data are reviewed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00121957
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Modeling of atmospheric transport and fumigation at shoreline sites (1975)
    Springer
    Boundary layer meteorology 9 (1975), S. 69-90 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Plumes initially exhausted into stable air over water disperse slowly; yet after crossing a coastline and travelling inland for a sufficient distance, the plumes interact with thermals rising from the land and may be brought rapidly to the ground. Model studies of a typical power plant sited along a lake shoreline were made to determine mixing-layer growth over the land and fumigation potential of elevated releases. An atmospheric boundary-layer wind tunnel simulated water and land temperature differences and an initially ground-based inversion approach flow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00232255
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...