Ekman

Silberring, J., Ekman, R., Desiderio, D.M., and Nibbering, N. M., Mass Spectrometry and Hyphenated Techniques in Neuropeptide Research, Wiley Interscience, New York, 2002. 

G. T. Preston, in E. Ekman, ed.. Clean Fuelsfrom Biomass, Sewage, Urban Refuse, Agricultural Wastes, IGT, Chicago, 1976, pp. 89—114. 

T. Yamasaki and co-workers. The Ekman Days 1981 Proc. Int. Sjmp. Wood Pulp Chem. SPCI, Vol. 2, Stockholm, 1981, p. 34. 

Effect of Fluid Viscosity and Inertia The dynamic effect of viscosity on a rotating liquid slurry as found in a sedimenting centrifuge is confined in veiy thin fluid layers, known as Ekman layers. These layers are adjacent to rotating surfaces which are perpendicular to the axis of rotation, such as bowl heads, flanges, and conveyor blades, etc. The thickness of the Ekman layer 6 is of the order... 

L. Juncheng, J. Wanqi. Modelling Ekman flow during the ACRT process with marked particles. J Cryst Growth 7 5 140, 1998. 

Dr. Mathias Ekman Theoretical Physics Royal Institute of Technology S-10044 Stockholm Sweden... 

As a result of these factors (wind, Ekman transport, Coriolis force) the surface ocean circulation in the mid-latitudes is characterized by clockwise gyres in the northern hemisphere and the counterclockwise gyres in the southern hemisphere. The main surface currents around these gyres for the world s oceans are shown in Fig. 10-6. The regions where Ekman transport tends to push water together are called convergences. Divergences result when surface waters are pushed apart. 

The high velocities in the Ekman layers and the thinness of the layers strongly enhance the heat transfer between the gas and the sidewalls. There exist a variety of well-esfablished analytical and experimental correlations for fhe heaf fransfer between gas and a rotating disc (or the wall of fhe vessel). Cobb and Saunders [15] correlated their experimental investigations of fhe average laminar heaf fransfer with the Reynolds number Re = < 2.4 x lO ... 

Although the detailed flow-structure in the vessel is unknown and can be predicted by numerical means, only the basic features of the flame-flow interaction can now be depicted. The interaction is shown schematically in Figure 6.4.7. Each of the Ekman layers formed at the sidewalls by the angular velocity perturbation of the flow induces two recirculation cells—one in front of the flame and one behind it, separated by the flame. The recirculation cell in front of fhe flame is of less importance, as the flow velocities there do not affect the flame. 

Flame-flow interaction in a rotating vessel, showing the generation by the sidewall of two recirculation cells before and after the flame driven by the Ekman layers. 

It is shown that the Ekman layers behind the flame front, generated by the rotational speed changes of the gas owing to expansion, cause flame detachment from the walls and reduction in flame width in the rotating vessels, ultimately causing flame quenching. 

In Chapter 6.4, J. Chomiak and J. Jarosinski discuss the mechanism of flame propagation and quenching in a rofating cylindrical vessel. They explain the observed phenomenon of quenching in ferms of the formation of fhe so-called Ekman layers, which are responsible for the detachment of flames from the walls and the reduction of fheir width. Reduction of the flame speed with increasing angular velocity of rofation is explained in terms of free convection effects driven by centrifugal acceleration. 

Figure 5 (a) Ekman-Birge grab sampler for clay or loamy sediments and (b) Smith-Mcintyre grab... 

R Sjoqvist, C Graffner, I Ekman, W Sinclair, JP Woods. In vivo validation of the release rate and pa-latability of remoxipride-modified release suspension. Pharm Res 10(7) 1020-1026, 1993. 

B Ekman, I Sjoholm. Incorporation of macromolecules in microparticles preparation and characteristics. Biochem 15 5115, 1976. 

Hansson I, Hamilton C, Ekman T and Forslund K (2000) Carcass quality in certified organic production compared with conventional livestock production . Journal of Veterinary Medicine Series B-Infectious Diseases and Veterinary Public Health, 47, 111-120. 

Hamilton C, Hansson I, Ekman T, Emanuelsson U and Forslund K (2002), Health in cows, calves and young stock on 26 organic dairy herds in Sweden , Veterinary Record, 150, 503-508. 

M. Reunamen, R. Ekman, M. Heinonen, Analysis of Finnish pine tar and tar from the wreck of frigate St. Nikolai, Holzforschung, 43, 33 39 (1989). 

R. Ekman, The suberin monomers and triterpenoids from the outer bark of Betula verrucosa Ehrh, Holzforschung, 37, 205 211 (1983). 

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