김동욱 김서영 이대영 이윤표 2024-01-21T07:11:50Z 2024-01-21T07:11:50Z 2021-09-06 2004-04 1229-6422 https://pubs.kist.re.kr/handle/201004/137696 Particle Image Velocimetry (PIV) measurements have been carried out to investigate the pulsatile flow characteristics in a triangular grooved channel. The results showed that a vortex was generated at the tip of the groove and flowed into the groove rotating inside during the acceleration phase of the main stream promoting the mixing of the fluid. Then, at the deceleration phase of the main stream, the vortex entrained fluid from the relatively slow moving main stream to grow bigger than the groove size. Finally the vortex was ejected to the main stream carrying the fluid away from the groove, resulting in the enhancement of mixing between the stagnant fluid in the groove and the main stream in the channel. It was found that the fluid mixing enhancement is maximized when the pulsatile period is the same as the time duration which the vortex takes to grow larger enough to fill the groove and to be ejected to the main stream. 대한설비공학회 맥동유동에 의한 그루브 채널내 유동혼합 촉진에 관한 PIV 이용 연구 PIV Investigations of the Flow Mixing Enhancement by Pulsatile Flow in a Grooved Channel Article 2 설비공학 논문집, v.16, no.4, pp.324 - 331 설비공학 논문집 16 4 324 331 kci ART001186033 Pulsatile flow(맥동유동) Grooved channel(그루브 채널) PIV(입자영상속도법) Vortex(와류) Flow mixing(유동혼합)