TY  - JOUR
TT  - Determination of Transition Onset in Laminar Pulsatile Pipe Flows
AU  - Özahi, Emrah
AU  - Özdinç Çarpınlıoğlu, Melda
PY  - 2013
DA  - June
JF  - Isı Bilimi ve Tekniği Dergisi
PB  - Türk Isı Bilimi ve Tekniği Derneği
WT  - DergiPark
SN  - 1300-3615
SP  - 125
EP  - 133
VL  - 33
IS  - 2
KW  - LabView
KW  - Türbülans Belirlenmesi
KW  - Laminardan Türbülansa Geçiş
KW  - Womersley Sayısı
KW  - Darbeli Boru Akışı
N2  - This paper presents a program devised in LabView 2009SP1 for the detection of the transition onset in laminar pulsatile pipe flows. As a conclusion of a comprehensive literature survey, it is deduced that there is no welldefined detection program even a methodology for determination of transition onset besides of conventional methods of visual observation on velocity waveforms. The operation of the program which is an original contribution to literature is introduced giving sample plots in the range of time-averaged Reynolds number of 1019±35 ≤ Reta ≤ 4817±164, oscillating Reynolds number of 107±4 ≤ Reos ≤ 4261±145, velocity amplitude ratio of 0.05±0.0017 ≤ Al ≤ 0.96±0.03 and Womersley number of 2.72 ≤ ≤ 32.21. As an original contribution to the available literature, two different flow maps that identify the border between laminar flow and transition onset in pulsatile pipe flow in terms of Reta= Reta(Reos)and Reta= Reta() are introduced in the covered experimental ranges
UR  - https://dergipark.org.tr/en/pub/isibted/issue//376131
L1  - https://dergipark.org.tr/en/download/article-file/400731
ER  -