Jamal Naser
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View article: Numerical Investigation of Hydrogen Blending on the Impinging Flame Structure in Non-Premixed CH<sub>4</sub>/H<sub>2</sub>/Air combustion for Scrap Metal Heating
Numerical Investigation of Hydrogen Blending on the Impinging Flame Structure in Non-Premixed CH<sub>4</sub>/H<sub>2</sub>/Air combustion for Scrap Metal Heating Open
Gas burners play a crucial role in various ironmaking and steelmaking processes, particularly for heating and cutting operations. In Electric Arc Furnaces (EAFs), high-speed gas burners are widely used to enhance thermal efficiency. While …
View article: Modelling of $${\text{NO}}_{{X}}$$ Mitigation Strategies for Hydrogen Shrouded Supersonic Coherent Jets for Steelmaking Furnaces
Modelling of $${\text{NO}}_{{X}}$$ Mitigation Strategies for Hydrogen Shrouded Supersonic Coherent Jets for Steelmaking Furnaces Open
Supersonic coherent jets are crucial in steelmaking, not only for injecting oxygen for metallurgical purposes but also to serve as a heat source during scrap heating. In steelmaking furnaces, hybrid coherent jets are often used, allowing t…
Wind and Slope Influence on Wildland Fire Spread, a Numerical Study Open
Wildfires pose significant threats to ecosystems, human lives, and property worldwide. Understanding the behavior of fire spread on sloped terrain is essential for developing effective firefighting strategies and improving fire prediction …
Heat Transfer Analysis in Double Diaphragm Preforming Process of Dry Woven Carbon Fibres Open
Double diaphragm forming (DDF) represents an efficient manufacturing technique leveraging vacuum pressure and heat to form composite material stacks between flexible diaphragms. This study focuses on the critical role of thermal management…
Structural Feasibility of a Wind Turbine Blade Inspired by an Owl Airfoil Open
Geometrical solutions for aerodynamic limitations comprise a major development towards improving the wind energy capture efficiency and aerodynamic performance of wind turbines. However, the implementation of some mechanisms such as consid…
Heat Transfer Analysis in Double Diaphragm Preforming Process of Dry Woven Carbon Fibres Open
Double diaphragm forming (DDF) represents an efficient manufacturing technique leveraging vacuum pressure and heat to form composite material stacks between flexible diaphragms. This study focuses on the critical role of thermal management…
Pulmonary artery effective elastance in patients with tricuspid valve regurgitation: a simple effective echo marker for risk stratification Open
Background/Introduction Tricuspid valve regurgitation (TR) is a common valvular disease associated with increased mortality. There is a need for tools to assess the interaction between the pulmonary artery (PA) circulation and the right ve…
Eularian–Eularian Model for Agglomeration Behavior of Combusted Iron Particles Open
Direct reduction of iron (DRI) technology in fluidized beds has been identified as a promising approach due to its environmental benefits over other methods. Nevertheless, the process of iron particle sintering in the DRI approach poses a …
Thermophysical Characterization of Materials for Energy-Efficient Double Diaphragm Preforming Open
The Double Diaphragm Preforming (DDPF) process uses vacuum pressure and heat to pre-shape dry carbon fabric reinforcements between flexible diaphragms in liquid composite molding (LCM). Accurate modeling of heat transfer within DDPF requir…
View article: NOx Prediction of Supersonic Coherent Jets for Electric Arc Steelmaking Furnace
NOx Prediction of Supersonic Coherent Jets for Electric Arc Steelmaking Furnace Open
Supersonic coherent jets are widely in practice in steelmaking processes including electric arc furnaces (EAF). Injecting oxygen through such coherent jets plays a vital role in enhancing the liquid gas mixing and reaction rates leading to…
Numerical Study of Coolant Flow Phenomena and Heat Transfer at the Cutting-Edge of Twist Drill Open
Cutting tool coolant channels play a pivotal role in machining processes, facilitating the efficient supply of cooling agents to high-stress areas and effective heat dissipation. Achieving optimal cooling at the tool’s cutting-edge is esse…
Thermophysical Characterization of Materials for Energy-Efficient Double Diaphragm Preforming Open
The Double Diaphragm Forming (DDF) process uses vacuum pressure and heat to pre-shape composite reinforcements between flexible diaphragms. Accurate modelling of heat transfer within DDF requires knowledge of the thermophysical properties …
The Effects of a Seagull Airfoil on the Aerodynamic Performance of a Small Wind Turbine Open
Birds’ flight characteristics such as gliding and dynamic soaring have inspired various optimizations and designs of wind turbines. The implementation of biological wing geometries such as the airfoil profile of seabirds has improved wind …
Effects of an Owl Airfoil on the Aeroacoustics of a Small Wind Turbine Open
Aerodynamic noise emitted by small wind turbines is a concern due to their proximity to urban environments. Broadband airfoil self-noise has been found to be the major source, and several studies have discussed techniques to reduce airfoil…
Co-Gasification of Polyethylene and Biomass in Catalytic Bed Material Open
In this work, a simplified comprehensive three-dimensional numerical model is developed to study the effect of hydrogen production on co-gasification of biomass and low-density polyethylene (LDPE). CFD software AVL Fire 2020 inbuilt algori…
Airfoil Control of Small Wind Turbines Open
Although the latest technologies have achieved outstanding improvements in the energy capture efficiency of wind power turbines, lack of cost effectiveness remains a major disadvantage. The problem lies in the limitation of operating effec…
Evaluation of a proposed and an existing dust ventilation/collection system in an underground mine crushing plant Open
Computational Fluid Dynamics (CFD) modeling of two alternative dust collection systems in an underground mine-crushing plant was carried out. In the proposed system, dust was collected/absorbed through the holes along the top edge of the R…
Evaluation of a conventional dust ventilation/collection system in an underground mine crushing plant Open
Air flow and dust dispersion in an existing underground mine crushing plant was modeled using (Computational Fluid Dynamics) CFD. In the conventional system, investigated in the present paper, the outgoing dust laden air was collected thro…
View article: Combustion modelling of top submerged lance furnace by using CFD tool
Combustion modelling of top submerged lance furnace by using CFD tool Open
Top Submerged Lance Technology (TSL) have been successively applied to recovery of a range of metals like tin, lead, copper, zinc, silver, nickel, aluminium, gold etc. around the world. Floyd has described the details of Top Submerged Lanc…
View article: CFD modelling of top submerged lance gas injection
CFD modelling of top submerged lance gas injection Open
Fluid flows are an integral part of many metallurgical processing operations. They affect the viability, effectiveness, and efficiency of many reactors, be they physical or chemical in nature. Gas injection methods are frequently used in m…
View article: Applications of CFD modelling in smelting industries: some recent developments
Applications of CFD modelling in smelting industries: some recent developments Open
Recent advancement in the high performance computing facilities has enabled Computational Fluid Dynamic (CFD) modelling technique as a powerful tool for the researchers working in the metallurgical field. CFD can predict flows ranging from…
View article: An experimental and computational study of aerodynamic properties of rugby balls
An experimental and computational study of aerodynamic properties of rugby balls Open
The aerodynamic properties of rugby balls as a function of wind speeds and yaw angles were measured using experimental and computational methods. The average drag and side forces coefficients for all speeds and yaw angles were computed and…
View article: A computational fluid dynamic modeling study of slag fuming in top submerged lance smelting furnace
A computational fluid dynamic modeling study of slag fuming in top submerged lance smelting furnace Open
Slag fuming is a process of extracting zinc from molten slag in the form of metal vapor by injecting or adding a reducing source such as pulverized or lump coal, natural gas, etc. Top Submerged Lance (TSL) technology has been successfully …
View article: A study of spin effects on tennis ball aerodynamics
A study of spin effects on tennis ball aerodynamics Open
Due to complex surface structure, the aerodynamic behaviour of a tennis ball is significantly different compared to other sports balls. This difference is more obvious when spin is involved. Although several studies have been conducted on …
Governing equations for multi-layered tsunami waves Open
In order to develop generalized governing equations for multi-layered long wave system, a three layer system was considered. It was anticipated that equations for top layer and bottom layer will be independent on number of intermediate lay…
CFD modelling of shrouded jet impingement on a liquid surface Open
A computational fluid dynamics (CFD) model was developed to simulate the liquid flow field and surface deformation caused by an impinging shrouded supersonic jet on a liquid bath from the top as used in oxygen steelmaking. Air and water wa…
Study on inclined jetting and splashing phenomenon in electric arc furnace steelmaking Open
In Electric Arc Furnace (EAF) steelmaking, scrap metal is melted by using electric arc and oxy-fuel burner inside the furnace. After that the molten metal is purified by blowing oxygen supersonically into the molten metal which in turn res…
Analysis of waves in a cavity and their significance to splashing in steelmaking Open
In steelmaking, metal droplets are generated due to the impact of supersonic jets onto the liquid metal bath. This phenomenon is generally referred to 'splashing' [1]. Splashing is an important phenomenon as it provides large interfacial a…
Development of dynamic models for oxygen steelmaking Open
The development of useful models for predicting and controlling Oxygen Steelmaking is very difficult because of the complex multi-phase physics and chemistry of the process. In particular, the relationship between the physics of droplet ge…
Hydrodynamic characteristics of a new sewer overflow screening device: CFD modeling and analytical study Open
Some of the major concerns regarding sewer overflows to receiving water bodies include serious environmental, aesthetic and public health problems. A noble self-cleansing sewer overflow screening device having a sewer overflow chamber, a r…