The Visualization Study on the Slug Flow Mechanisms of the Air-Water Two-Phase in a 50 mm Horizontal Pipe

Abstract

The slug flow phenomena are often encountered in various industrial applications such as petroleum, process, and power plant. The presence of slug flow should be avoided as it causes structural damage due to resonance, corrosion and pipes blast. From the view point of multiphase flow, the understanding of the slug initiation mechanism is very important in pipeline design. This research is conducted using horizontal transparent acrylic pipes with diameters of 50 mm with a variation on the superficial velocity of water between 0,1 m/s and 0,77 m/s and superficial velocity of air between 0,31 m/s and 6,2 m/s. In the present experimental study, the slug initiation mechanisms were explained by visual observation by using high speed video cameras. As the results, the slug flow initiation mechanisms were clarified. Furthermore, the proposed of flow initiation map was introduced.

Analisis Pengaruh Pola Aliran Multifasa Minyak Dan Gas Terhadap Pressure Loss Pada Pipa Vertikal Dengan Ansys Fluent

“…Terjadinya slug flow diawali dengan di produksinya minyak kemudian diangkut melalui jaringan pipa sebagai campuran kompleks. Salah satu rezim aliran yang umum dikenal sebagai aliran slug, di mana fluida mengalir secara terputus-putus di sepanjang pipa dalam massa terkonsentrasi, yang disebut slug (Dinaryanto et al, 2018). Memahami aliran slug menjadi sulit karena sifatnya yang sementara dan proses dinamika fluida multidimensi yang mencirikannya.…”

Visualisasi Aliran Dua Fasa Solid-Gas Di Pipa Horisontal Diameter 15,8 Mm Dan 24,5 Mm Pada Mesin Pneumatic Conveying

“…Hal ini juga mempengaruhi secara langsung terhadap penurunan tekanan, stabilitas, dan keamanan sistem dua fase. Pola aliran dapat diidentifikasi dengan berbagai cara antara lain densitometer sinar gamma [4], metode impedansi listrik, fluktuasi beda tekanan [5,6,7], metode visualisasi [8,9,10], pengolahan citra [11,12,13], dan metode ultrasound [14]. Namun demikian, metode identifikasi di atas merupakan identifikasi pola aliran dua fase gascair.…”