scholarly journals 3D Integrated Modeling of Supersonic Coherent Jet Penetration and Decarburization in EAF Refining Process

Processes ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 700
Author(s):  
Yuchao Chen ◽  
Armin K. Silaen ◽  
Chenn Q. Zhou
Keyword(s):  
Liquid Steel ◽  
Flow Characteristics ◽  
Bath Temperature ◽  
Integrated Model ◽  
Refining Process ◽  
Computational Time ◽  
Reacting Flow ◽  
Two Phase ◽  
Decarburization Rate ◽  
Coherent Jet

The present study proposes a complete 3D integrated model to simulate the top-blown supersonic coherent jet decarburization in the electric arc furnace (EAF) refining process. The 3D integrated model avoids the direct simulation of the supersonic coherent jet interacting with the liquid steel bath and provides a feasible way to simulate the decarburization in the liquid steel-oxygen two-phase reacting flow system with acceptable computational time. The model can be used to dynamically predict the details of the molten bath, including 3D distribution of in-bath substances, flow characteristics and bath temperature and provide a basis for optimizing the decarburization rate or other required parameters during the refining process.

Front Wave Prediction in Water Hammer Phenomena Involving Two-Phase Flows

2013 ◽  
Author(s):  
Alina Bogoi ◽  
Jean Marie Seynhaeve ◽  
Radu D. Rugescu ◽  
Oliviu Sugar ◽  
Michel Giot
Keyword(s):  
Flow Characteristics ◽  
Momentum Conservation ◽  
Complex Problem ◽  
Water Hammer ◽  
Computational Time ◽  
Gas Flows ◽  
Two Phase ◽  
Degree Of Confidence ◽  
Phase Liquid ◽  
Fluid Flow Characteristics

A genuine mathematical model for one dimensional, unsteady, two phase (liquid-gas) flows is presented that intends to solve the complex problem of two phase behavior of fluids. The mechanism of the model describes the fluid flow characteristics of the mixture, supposing that the conditions for homogeneous vaporization are fulfilled and the condensate fraction of the composite fluid keeps constant. In particular, the equation of momentum conservation for the gas phase is derived from the Voinov equation. For its domain of validity (bubbly flows), the model is of hyperbolic type and can be written in the conservative form. The numerical results obtained for the water hammer phenomena show that the present work is able to supply accurate results, at least of the same degree of confidence as the results provided by an ordinary, commercial CFD code, still with a considerable reduction in computational time.

Reacting Spray Structure of a Counter-Rotating Swirl Cup

2005 ◽  
Author(s):  
Yongqiang Fu ◽  
Jun Cai ◽  
San-Mou Jeng ◽  
Hukam Mongia
Keyword(s):  
Recirculation Zone ◽  
Flow Characteristics ◽  
Droplet Size Distribution ◽  
Reacting Flow ◽  
Volume Flux ◽  
Complex Flow ◽  
Two Phase ◽  
Spray Structure ◽  
Swirl Velocity ◽  
Component Phase

An experimental study was conducted to characterize the two-phase nonreacting and reacting flow characteristics of a mixer comprised of concentric counter-swirlers installed in a 3-inch square test section. A two-component Phase Doppler Particle Analyzer (PDPA) system was used to measure mean and fluctuating velocity components in the three directions, as well as the droplet size distribution and volume flux. Detailed measurements have been used to improve mechanistic understanding of reacting counter-swirling complex flow-field with attendant changes expected in future modeling direction. As known empirically for the mixer studied, the present indepth experimental results show that the reacting flowfield characteristics are significantly different from that of the isothermal flow in regard to, for example, the recirculation zone, and decay of the counter-swirl velocity component.

INVESTIGATION OF STRATIFIED WAVY TWO-PHASE FLOW CHARACTERISTICS

Equipment ◽  
2006 ◽  
Author(s):  
Marijus Seporaitis ◽  
S. Gasiunas ◽  
Raimondas Pabarcius
Keyword(s):  
Two Phase Flow ◽  
Flow Characteristics ◽  
Phase Flow ◽  
Two Phase

Investigation of air-water two-phase flow characteristics in a 25.4 mm diameter circular pipe

2021 ◽  
pp. 103813
Author(s):  
Dewei Wang ◽  
Shanbin Shi ◽  
Yucheng Fu ◽  
Kyle Song ◽  
Xiaodong Sun ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Flow Characteristics ◽  
Circular Pipe ◽  
Phase Flow ◽  
Two Phase

Heat Transfer Analysis of Room-Temperature Finned-Tube Evaporator for Cryogenic Nitrogen

2011 ◽  
Vol 133 (9) ◽  
Author(s):  
Shun Ching Lee ◽  
Tzu-Min Chen
Keyword(s):  
Heat Flux ◽  
Room Temperature ◽  
Integrated Model ◽  
Finned Tube ◽  
Heat Transfer Analysis ◽  
Outlet Temperature ◽  
Ambient Conditions ◽  
Governing Equations ◽  
Initial Value ◽  
Two Phase

Abstract The behavior of cryogenic nitrogen in a room-temperature evaporator six meters long is analyzed. Trapezoid fins are employed to enhance the heat flux supplied by the environment. The steady-state governing equations specified by the mixed parameters are derived from the conservations of momentum and energy. The initial value problem is solved by space integration. The fixed ambient conditions are confirmed by way of the meltback effect. An integrated model is utilized to analyze the convective effect of two-phase flow, which dominates the evaporation behavior. Another integrated model is employed to determine the total heat flux from the environment to the wet surface of the evaporator. The foundation of the formation of an ice layer surrounding the evaporator is presented. If the fin height is shorter than 0.5 m, the whole evaporator is surrounded by ice layer. If the fin height is longer than 0.5 m, the total pressure drop of nitrogen in the tube is negligible. The outlet temperature is always within the range between −12 °C and 16 °C for the evaporator with the fin height of 1.0 m. For the evaporator with dry surface, the nitrogen has the outlet temperature less than the ambient temperature at least by 5 °C.

scholarly journals Experimental data for the slug two-phase flow characteristics in horizontal pipeline

Data in Brief ◽  
2018 ◽  
Vol 16 ◽  
pp. 527-530 ◽  
Author(s):  
Abdalellah O. Mohmmed ◽  
Mohammad S. Nasif ◽  
Hussain H. Al-Kayiem
Keyword(s):  
Experimental Data ◽  
Two Phase Flow ◽  
Flow Characteristics ◽  
Phase Flow ◽  
Two Phase

Experimental Study of Two-Phase Flow Induced by Cavitation Through a Safety Relief Valve

2013 ◽  
Author(s):  
Jorge Pinho ◽  
Patrick Rambaud ◽  
Saïd Chabane
Keyword(s):  
Local Minimum ◽  
Two Phase Flow ◽  
Flow Characteristics ◽  
Control Valve ◽  
Recovery Factor ◽  
Phase Flow ◽  
Relief Valve ◽  
Two Phase ◽  
Blow Down ◽  
Choked Flow

The goal of this study is to understand the behavior of a safety relief valve in presence of a two-phase flow induced by cavitation, in which the mass flux tends to be reduced. Two distinct safety relief valves are tested: an API 2J3 type and a transparent model based on an API 1 1/2G3 type. Instead of using a spring, the design of both valves allows the adjustment of the disk at any desired lift. Tests are conducted with water at ambient temperature. Results show a similar influence of cavitation on the flow characteristics of both valves. The liquid pressure recovery factor FL, which is normally used to identify a choked flow condition in a control valve, is experimentally determined in a safety relief valve. The existence of a local minimum located at a height position L/D = 0.14 indicates in this position, a change on the flow characteristics of both valves. It is verified that the existence of a local minimum in the liquid recovery factor is related to the minimum cross section of the flow, which does not remain constant for every lift positions. Furthermore, it is remarked that in the case of the 2J3 safety valve, the blow down ring adjustment has significant influence on the location of the minimum cross sections of the flow.

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