Vascular resistance recent results showing the sheath flow surrounding the plug flow in a vessel, the sheath flow size is not neglectible in the real blood flow velocity profile in a vessel. The velocity profile is directly linked to flow resistance in a vessel. The viscosity variations, according to Thurston, are also balanced by the sheath flow size around the plug flow. The secondary regulators of vascular resistance, after vessel radius, is the sheath flow size and its viscosity. Thurston, as well, shows that the resistance R is constant, where, for a defined vessel radius, the value η(δ)/δ is constant in the
Experiments in Fluids C. Tropea (Technical University of Darmstadt, Germany) and J. Westerweel (Laboratory for Aero & Hydrodynamics, Delft University of Technology, Netherlands). The founding editors are J. H. Whitelaw (Imperial College, United Kingdom) and W. Merzkirch (University of Essen, Germany). Jim Whitelaw served the journal from 1982 until 1999; Wolfgang Merzkirch was with the journal from 1982 until 2002. Experiments in Fluids Experiments in Fluids is a scientific, peer-reviewed scientific journal published monthly by Springer Science+Business Media. The journal presents contributions that employ existing experimental techniques to gain an understanding of the underlying flow physics in specific areas. These areas include turbulence,