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
Physics of Fluids Physics of Fluids Physics of Fluids is a peer-reviewed monthly scientific journal on fluid dynamics, founded by the American Institute of Physics in 1958, and is published by the AIP Publishing. The journal focus is the dynamics of gases, liquids, and complex or multiphase fluids—and the journal contains original research resulting from theoretical, computational, and experimental studies. From 1958 through 1988, the journal included plasma physics. From 1989 until 1993, the journal split into "Physics of Fluids A" covering fluid dynamics, and "Physics of Fluids B," on plasma physics. In 1994, the latter was renamed "Physics of Plasmas", and the