viscous resistance


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Related to viscous resistance: viscosity, fluid resistance

viscous resistance

Nonelastic opposition of tissue to ventilation due to the energy required to displace the thorax and airways.
See also: resistance
References in periodicals archive ?
Permeability Symbol Viscous resistance factor Initial porosity K C Initial SVF [[epsilon].sub.0] Main permeability y-dir.
where [phi] is porosity, [rho] is fluid density, kg/[m.sup.3] (lb/[ft.sup.3]), V is fluid velocity vector, m/s (ft/s), t is time, s, p is pressure Pa (lb/[ft.sup.2]), [??] is shear stress tensor, Pa(lb/[ft.sup.2]), g is the gravitational acceleration, m/[s.sup.2] (ft/[s.sup.2]), [beta] is thermal expansion coefficient, [K.sup.-1] ([R.sup.-1]), [DELTA]T is temperature difference with respect to a reference temperature,[degrees]C ([degrees]F), [mu] is dynamic viscosity, Pa x s (lb/ft x s), 1/[alpha] is viscous resistance coefficient, [m.sup.-2] ([ft.sup.-2]), and [C.sub.2] is inertial resistance coefficient, [m.sup.-1] ([ft.sup.-1]) and
where [phi] is porosity, [rho] is fluid density, kg/[m.sup.3] (lb/[ft.sup.3]), V is fluid velocity vector, m/s (ft/s), t is time, s, p is pressure Pa (lb/[ft.sup.3]), [??] is shear stress tensor, Pa (lb/[ft.sup.3]), g is the gravitational acceleration, m/[s.sup.2] (ft/[s.sup.2]), [beta] is thermal expansion coefficient, [K.sup.-1] ([R.sup.-1]), [DELTA]T is temperature difference with respect to a reference temperature, [degrees]C ([degrees]F), [micro] is dynamic viscosity, Pa-s (lb/ft[??]s), 1/[alpha] is viscous resistance coefficient, [m.sup.-2] ([ft.sup.-2]), and [C.sub.2] is inertial resistance coefficient, [m.sup.-1] ([ft.sup.1]) and
The total resistance is broken down in to viscous resistance and wave making resistance to analyze the effect of trim on each part.