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article

Performance comparison of different aerodynamic shapes for autonomous underwater vehicles

Khalin, Anatoliy, Kizilova, Nataliya, Khalin, Anatoliy, Kizilova, Nataliya

Archive of Mechanical Engineering > 2019 > 66 > 2

article

Ventdef: A new engineering model for vented gas deflagration based on NFPA 68 (2018)

Amy Shen, Derek Miller

Process Safety Progress > 41 > 4 > 738 - 750

Hydrogen production and storage equipment are often located inside confined enclosures such as containers or buildings. Deflagration vent panels are one of the most common and simplest methods to mitigate the consequences of gas deflagrations in confined systems. There are well‐established methods for sizing vent panels, such as the National Fire Protection Association standard NFPA 68, but these...

article

Gone with the wind: Ventjet is a new engineering model for atmospheric dispersion

Derek Miller, Elena Vyazmina, Amy Shen, Elizabeth Lutostansky

Process Safety Progress > 41 > 2 > 307 - 351

Modeling atmospheric dispersion of flammable and toxic gases is very common in the industry. There is a large spectrum of different models, from Gaussian, Integral, up to computational fluid dynamics (CFD) models. However, these simple engineering models (Gaussian, Integral) do not always correctly estimate the dispersion of gases with a density higher than air. The purpose of this paper is to present...

article

Effect of biomass co‐firing position on combustion and NO_X emission in a 300‐MWe coal‐fired tangential boiler

Yaojie Tu, Jianlan Li, Dongfeng Chang, Bo Hu

Asia‐Pacific Journal of Chemical Engineering > 17 > 1 > n/a - n/a

Co‐firing biomass in an existing coal combustion boiler is a promising way to mitigate carbon emission in the context of global carbon neutrality. This paper investigated the effect of biomass injection location on combustion and NO_X formation characteristics in a 300‐MWe tangential boiler co‐firing with coal. Numerical models have been validated against experimental measurement for both pure coal...

article

Numerical investigation of the effect of weather conditions on the escalation and propagation of fire‐induced domino effect

Asher Ahmed Malik, Mohammad Shakir Nasif, Ainul Akmar Mokhtar, Mohd Zahirasri Mohd Tohir

Process Safety Progress > 40 > 4 > 296 - 308

Fire‐induced domino accidents are less probable but highly consequent. Although past studies conducted risk assessment of such events, classical models were used for impact estimation. Moreover the influence of varying weather on evolution of fire domino effect was not investigated, where past research necessitates the use of computational fluid dynamics to perform such analysis. This paper adopts...

article

Investigation of multi‐fuel combustion behavior and synergy effect using improved steady‐state discrete particle model simulation

Surapoom Somwangthanaroj, Suneerat Fukuda

International Journal of Energy Research > 45 > 12 > 17291 - 17301

This paper presents a simulation study of municipal solid waste (MSW) combustion using a multi‐fuel combustion model, which was an extended version from the one previously developed by the authors. The model was a steady‐state model with partial transient implementation as user‐defined functions (UDF) developed in ANSYS Fluent platform to investigate the combustion behavior of fuel interacting in...

article

Particle release and transport from human skin and clothing: A CFD modeling methodology

Douaa Al Assaad, Shen Yang, Dusan Licina

Indoor Air > 31 > 5 > 1377 - 1390

Particle release from human skin and clothing has been identified as an important contributor to particulate matter burden indoors. However, knowledge about modeling the coarse particle release from skin and clothing is limited. This study developed a new empirically validated CFD modeling methodology for particle release and transport from seated occupants in an office setting. We tested three modeling...

article

Numerical Study of Mixing and Mass Transfer in a Micromixer by Stimulation of Magnetic Nanoparticles in a Magnetic Field

Neda Azimi, Masoud Rahimi, Parastoo Zangenehmehr

Chemical Engineering & Technology > 44 > 6 > 1084 - 1093

A numerical study on the hydrodynamics of ferrofluid flow and mass transfer characteristics in a Y‐type micromixer is performed. Computational fluid dynamics (CFD) simulation is accomplished to survey the behavior of ferrofluid flow subject to an external magnetic field and to specify its effect on the mass transfer between two immiscible liquid phases. The geometric reconstruction scheme (Geo‐Reconstruct)...

article

Investigation of aerodynamic parameters of solar plane airfoil using CFD modeling

Marek Jaszczur, Karolina Papis, Michał Książek, Grzegorz Czerwiński, more

Computer Science > 2021 > T. 22 (1) > 123–142

The technology of solar-powered aerial vehicles requires enormous financial support and further development. For this purpose, the computational fluid dynamic can be used. In order to carry out necessary analyses and model development in this research, ANSYS Fluent software was used. Using the first version of the AGH Solar Plane model, preliminary analysis of lift, drag and tearing off the stream...

article

Computational fluid dynamics modeling of ibuprofen removal using a hollow fiber membrane contactor

Ali Qatezadeh Deriss, Sepideh Langari, Mostafa Taherian

Environmental Progress & Sustainable Energy > 40 > 1 > n/a - n/a

In this study, modeling and simulation of removing a common pharmaceutical contaminant by a hollow fiber membrane contactor (HFMC) were carried out. For this purpose, a model was presented for separation of ibuprofen from wastewater in the membrane contactor. The suggested model was developed by coupling the mass and momentum equations. The partial differential equations (PDEs) and the corresponding...

article

The influence of geometric characteristics of the buildings facades on the heat transfer to the wind flow

Boris Basok, Boris Davydenko, Anatoliy Pavlenko, Vladimir Novikov, more

Journal of New Technologies in Environmental Science > 2021 > Vol. 5, nr 1 > 11--22

This paper presents the results of a numerical study of heat transfer from the external surfaces of freestanding structures in the surface layer of the atmosphere. Numerical models of structures have the same heat transfer area, but different heights and lengths. Numerical modeling of heat transfer from structures in a wind flow in a three-dimensional formulation made it possible to establish some...

article

Analysis of dustiness state in a driven underground dog heading ventilating by auxiliary air-duct

Jarosław Brodny, Magdalena Tutak

Management Systems in Production Engineering > 2020 > nr 2 (28) > 73--77

Dustiness of the mine atmosphere during carrying out exploitation is one of the most hazardous factors threaten to health and life of employees. Also it is large hazard for all type of mechanical and electrical devices operating in mining headings. Coal dust is also very dangerous due to its possibility of explosion. Currently applied technologies of rock mass mining process, entire transport process...

article

Numerical calculation with experimental validation of pressure drop in a fixed‐bed reactor filled with the porous elements

Dmitry Pashchenko, Igor Karpilov, Ravil Mustafin

AIChE Journal > 66 > 5 > n/a - n/a

To study flow dynamics in a fixed‐bed reactor, experiment and numerical simulation are used. In this work, the flow dynamics in a fixed‐bed reactor filled with porous particles was simulated. For verification, experimental data were used. Porous particles were prepared from grains with sizes from 0.2 to 2.0 mm. Porous particles made by sintering grains in a muffle furnace. The study of pressure drop...

article

Enhanced gravity particle classifier: Experiments with 3D printed device and computational fluid dynamics simulations

Arjun Kumar Pukkella, Raviraju Vysyaraju, Sivakumar Subramanian

AIChE Journal > 65 > 9 > n/a - n/a

Centrifugal force developed in a fluid flow through closed spiral channel produces enhanced gravity environment to facilitate particle classification. The novel design is inspired by open channel spiral concentrators that are used in mineral processing industries. The concept is initially validated through computational fluid dynamics (CFD) simulations. Preferential movement of coarser particles,...

article

On the assessment, implementation, validation, and verification of drag and lift forces in gas–liquid applications for the CFD codes FLUENT and CFX

Gustavo Montoya, Jay Sanyal, Markus Braun, Mohammed Azhar

Experimental and Computational Multiphase Flow > 2019 > 1 > 4 > 255-270

The understanding of two-phase gas–liquid flows is of utmost importance in a large range of industrial applications, including the petrochemical, pharmaceutical, biochemical, nuclear, and metallurgical industries. At ANSYS, significant effort is being made in assessing the physical force models present in both FLUENT and CFX. This includes the investigation of the interfacial closures (drag, lift,...

article

Flow dynamic in a packed bed filled with Ni‐Al₂O₃ porous catalyst: Experimental and numerical approach

Dmitry Pashchenko

AIChE Journal > 65 > 5 > n/a - n/a

Numerical simulations and experiments have been carried out to explore the effect of particle shapes on the pressure drop and the loss factor in a packed fixed bed filled with a porous catalyst. The packed bed is presented by the Ni‐Al₂O₃ catalyst of the different shapes. The commercial program ANSYS Fluent is used for the analysis; more than 20 mln cells are used for computational fluid dynamics...

article

CFD Modeling of Operating Processes of a Solar Air Heater in ANSYS Fluent

D. I. Pashchenko

Journal of Engineering Physics and Thermophysics > 2019 > 92 > 1 > 73-79

Rapid development of the technologies of use of renewable energy sources in the recent decade has opened up prospects for satisfying our society′s ever growing needs for fuel and power resources. In the present work, the author has shown results of investigation into the thermal and aerodynamic characteristics of a solar air heater. A computer model whose adequacy has been confirmed using experimental...

article

Performance comparison of different aerodynamic shapes for autonomous underwater vehicles

Anatoliy Khalin, Nataliya Kizilova

Archive of Mechanical Engineering > 2019 > Vol. LXVI, nr 2 > 171--189

A brief review of the existing autonomous underwater vehicles, their types, design, movement abilities and missions is presented. It is shown, the shape optimization design and enhancement of their efficiency is the main problem for further development of multipurpose glider technologies. A comparative study of aerodynamic performance of three different shape designs (the airfoil NACA0022 based (I),...

article

Computational Fluid Dynamics Modeling of Combustion of Synthetic Fuel of Thermochemical Heat Recuperation Systems

D. I. Pashchenko

Combustion, Explosion, and Shock Waves > 2018 > 54 > 6 > 673-680

CFD modeling of the combustion of synthetic fuel formed in the systems of thermochemical recuperation of waste flue gas heat due to steam methane reforming was performed using the ANSYS Fluent software. Scientific justification and validation of the physicomathematical approaches involved the ANSYS Fluent for the problems of modeling the combustion of multicomponent hydrogen-containing gas mixtures...

article

Modeling and experimental investigation of a Wurster type fluidized bed reactor coupled with an air atmospheric pressure plasma jet for the surface treatment of polypropylene particles

Seyedshayan Tabibian, Farzaneh Arefi‐Khonsari, Abdessadk Anagri, Mikel Leturia, more

Plasma Processes and Polymers > 15 > 11 > n/a - n/a

Polypropylene (PP) particles are used for various purposes, however, the good mechanical properties of PP are counterbalanced by a poor wettability. The wettability of PP particles was therefore improved by an atmospheric pressure blown‐arc air plasma jet treatment in a new designed homemade Wurster fluidized bed reactor (Wurster‐FBR). This reactor, was used to treat 200 g of particles per batch...

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Search results

Performance comparison of different aerodynamic shapes for autonomous underwater vehicles

Ventdef: A new engineering model for vented gas deflagration based on NFPA 68 (2018)

Gone with the wind: Ventjet is a new engineering model for atmospheric dispersion

Effect of biomass co‐firing position on combustion and NO_X emission in a 300‐MWe coal‐fired tangential boiler

Numerical investigation of the effect of weather conditions on the escalation and propagation of fire‐induced domino effect

Investigation of multi‐fuel combustion behavior and synergy effect using improved steady‐state discrete particle model simulation

Particle release and transport from human skin and clothing: A CFD modeling methodology

Numerical Study of Mixing and Mass Transfer in a Micromixer by Stimulation of Magnetic Nanoparticles in a Magnetic Field

Investigation of aerodynamic parameters of solar plane airfoil using CFD modeling

Computational fluid dynamics modeling of ibuprofen removal using a hollow fiber membrane contactor

The influence of geometric characteristics of the buildings facades on the heat transfer to the wind flow

Analysis of dustiness state in a driven underground dog heading ventilating by auxiliary air-duct

Numerical calculation with experimental validation of pressure drop in a fixed‐bed reactor filled with the porous elements

Enhanced gravity particle classifier: Experiments with 3D printed device and computational fluid dynamics simulations

On the assessment, implementation, validation, and verification of drag and lift forces in gas–liquid applications for the CFD codes FLUENT and CFX

Flow dynamic in a packed bed filled with Ni‐Al₂O₃ porous catalyst: Experimental and numerical approach

CFD Modeling of Operating Processes of a Solar Air Heater in ANSYS Fluent

Performance comparison of different aerodynamic shapes for autonomous underwater vehicles

Computational Fluid Dynamics Modeling of Combustion of Synthetic Fuel of Thermochemical Heat Recuperation Systems

Modeling and experimental investigation of a Wurster type fluidized bed reactor coupled with an air atmospheric pressure plasma jet for the surface treatment of polypropylene particles

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