000			01836aab a2200217 4500
008			231122b1989 |||mr||| |||| 00| 0 eng d
022			_a0017-9310
100			_apeattie, Robert A. _9879024
100			_aBudwig, Ralph _9879025
245			_aHeat Transfer In Laminar, Oscillatory Flow In Cylindrical And Conical Tubes
300			_a923-934 p.
520			_aIn order to assess the effect of frequency on transport of a passive scalar contaminant in an oscillatory flow, a piston-driven pipe flow is established. Two pipe test section geometries are used: one straight, round and uniform and the other uniformly tapering (i.e. conical). Flow is driven at frequencies characteristic of human breathing, both resting, normal and high frequency. A screen of closely spaced, parallel, thin wires is placed perpendicular to the flow, in the test section and is heated so as to dissipate a constant power into the fluid. The subsequent time-average and instantaneous temperature fields are measured, as functions of position. The results are shown to be consistent with the consequences of transport of heat by a combination of convection and diffusion. Convective transport is found to increase with frequency, at constant amplitude, but the effective diffusivity does not obey the predictions of theories which are based on an assumption of constant average axial gradient of the scalar field.
650			_aHeat Transfer _927
650			_aLaminar _9681959
650			_aOscillatory Flow _9871709
650			_aCylindrical Tube _9879026
650			_aConical Tube _9879027
773	0		_x00179310 _dNew York, U.S.A : Pergamon Subsidiary of Elsevier Science & Technology _tInternational Journal of Heat and Mass Transfer
856			_uhttps://www.sciencedirect.com/science/article/pii/001793108990241X
942			_2ddc _n0 _cART _o14993 _pMr. Muhammad Rafique Al Haj Rajab Ali (Late)
999			_c814356 _d814356