| dc.identifier.citation | Alleborn , 1997, Further contributions on the two dimensional flow in sudden expansion, International journal Fluid Mechanics,vol 330, pp 169-188,Cambridge University Press Chistine Darve, 2000, US-IT-HXTU Pressure drop distribution,http://WWW_bd New.fnal.Gov / Cryo-darve/het exchanger Gonbadipoor N., Simpsom G and Yufeng Yao, 2006, Steady And Transient Simulation Of Aerodynamic Behaviour around The Body, M.Sc. Thesis, Kingston University, London Sarjito, 2002, Studi aliran dua fase gas-cair melewati perbesaran saluran secara mendadak penampang lingkaran, Tesis S-2, Jurusan Teknik Mesin Universitas Gadjah Mada Yogyakarta Sarjito, Rino and Effendy 2004, Studi aliran dua fase gas-cair melewati perbesaran saluran secaran mendadak penampang segiempat, Skripsi S-1, Jurusan Teknik Mesin Universitas Muhammadiyah Surakarta | en_US |
| dc.description.abstract | The steady and unsteady flow through sudden enlargement circular pipe was
studied experimentally and computionally both in one and two-phase flows.
In this paper, the CAD model of Computational Fluid Dynamic method was
selected to investigate of properties flow distribution. The models designed in
Solid Works and analyzed by exemploying Computational Fluid Dynamics
(CFD) package. At the end, the streamline of model is compared with current
data secondary that has been measured experimentally. Improving flow-rate
and selecting an accurate turbulence model for predicting flow separation
were also studied. Eddy current behavior during enlargement, maximum
speed and length of circulation were calculated in detail as an initial steady
state simulation. Full model of the pipe produced in an appropriate domain
to look at the laminaer and turbulence behavior at the front and rear of the
enlargement in different time steps. It was found that the flow-rate quality
had a great influence to convergence and changed Eddy current length. In
particular, it is important to have estimates of pressure drops along pipe, lift
and side force characteristics at an early stage in a design. It was also
determined that the pipe geometry parameters (edge, ratio of diameter, front
side, inner body surface, rear end tail extension and underbody roughness)
had a significant role in shifting laminar, turbulence and Eddy current
behavior of the flow in pipe. Controlling the length, drag and pitching
moment needs a great understanding of the fluid dynamics around the pipe. | en_US |
