000			a
999			_c19055 _d19055
003			OSt
005			20230328120824.0
008			230328b xxu||||| |||| 00| 0 eng d
040			_aAIKTC-KRRC _cAIKTC-KRRC
100			_920290 _aDurst, F.
245			_aPipe inlays to shorten the development lengths of laminar pipe flows: a numerical study
250			_aVol.103(6), Dec
260			_aUSA _bSpringer _c2022
300			_a1349-1360p.
520			_aExperimental investigations of fully developed laminar pipe flows, at very high Reynolds numbers and diameters of about 30 mm and more, are nowadays considerably hampered by requirements of long pipe lengths to reach the fully developed states of the flows. The literature shows this for flow cases with constant inlet velocity profiles and the present paper refers to this work. The authors´ own numerical predictions show, that the states of fully developed pipe flows can be reached, at much shorter development lengths, by modifying the inlet velocity profiles. Numerical computations are presented to prove this finding. Knowledge is extracted from these computations, to construct practically realizable inlays for the inlet regions of pipes. Two- and three-dimensional numerical computations are performed to show that appropriately chosen inlays allow development lengths of laminar pipe flows to be considerably shortened. Suggestions are made to use such inlays to carry out experimental investigations of fully developed pipe flows at high Reynolds numbers and larger pipe diameters, without the need to use long pipes. These studies show that, with such inlays, the required pipe lengths can be shortened by factors of over 200 in comparison with development lengths obtained for constant inlet velocities.
650		0	_94626 _aMechanical Engineering
700			_920291 _aNieminen, T.
773	0		_dKolkata Institution of Engineers (India) _tJournal of the institution of engineers (India): Series C _x2250-0545
856			_uhttps://link.springer.com/article/10.1007/s40032-022-00886-w _yClick here
942			_2ddc _cAR