Browsing Publikasjoner fra CRIStin - NTNU by Title
Now showing items 5005-5024 of 38525
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CFD modeling of biomass combustion and gasification in fluidized bed reactors using a distribution kernel method
(Peer reviewed; Journal article, 2022)A three-dimensional reactive multi-phase particle-in-cell (MP-PIC) model is employed to investigate biomass combustion and gasification in fluidized bed furnaces. The MP-PIC model considered here is based on a coarse grain ... -
CFD Modeling of boron removal from liquid silicon with cold gases and plasma
(Journal article; Peer reviewed, 2018)The present study focuses on a specific step of the metallurgical path of purification to provide solar-grade silicon: the removal of boron through the injection of H2O(g)-H2(g)-Ar(g) (cold gas process) or of Ar-H2-O2 ... -
CFD modeling of ice formation and melting in horizontally cooled and heated plates
(Chapter, 2019)This paper investigates the ice formation and melting processes in a novel CTES unit using the commercial CFD software ANSYS Fluent 19. The storage unit is designed to operate as a peak shaving device integrated into the ... -
CFD Modeling of Local Scour Around a Pair of Tandem Cylinders under Wave Conditions
(Journal article; Peer reviewed, 2015)Local scour in a marine environment can lead to the failure of offshore and coastal structures. This is also the case, when marine infrastructure is built in Arctic conditions. The knowledge and understanding of erosion ... -
CFD Modeling of Varied Flow Conditions Over an Ogee-Weir
(Journal article, 2017)Accurate estimation of discharge capacity and local hydrodynamics are essential when designing hydraulic structures. Instead of the application of conventionally used empirical relationships, this study introduces a 3D ... -
CFD Modelling of Alumina Feeding
(Journal article, 2018)The dissolution and distribution of alumina in molten cryolite bath is a complex process, involving heat and mass transfer, phase transition and dynamics for a particle population with variable size and properties. Although ... -
CFD modelling of irregular and focused waves using wave reconstruction
(Chapter, 2017)The real sea state is composed of the focused and steep irregular waves which makes their study very important in the design of offshore wind turbines. Computational Fluid Dynamics (CFD) can be used as an effective tool ... -
CFD modelling of R410A flow through an expansion valve using equilibrium and modified relaxation models
(Peer reviewed; Journal article, 2021)The two-phase flow of R410A refrigerant through an electronic expansion valve (EEV) is modelled using two models, the Homogeneous Equilibrium Model (HEM) and Homogeneous Relaxation Model (HRM) in a CFD numerical analysis. ... -
CFD Simulations of Multi-Directional Irregular Wave Interaction With a Large Cylinder
(Chapter, 2018)Ocean waves are random by nature and can be regarded as a superposition of a finite number of regular waves travelling in different directions with different frequencies and phases. Cylinder-shaped objects are commonly ... -
CFD Simulations of Roll Motion of a Floating Ice Block in Waves using REEF3D
(Journal article; Peer reviewed, 2015)Floating ice blocks in waves are generally seen in managed ice and in marginal ice zones. Detailed investigations into the hydrodynamics of a floating ice block provides insight into the interaction of floating ice with ... -
CFD Simulations of Turbulent Flow in the Human Upper Airways
(Chapter, 2017)In this paper, investigations are conducted using Reynolds-averaged Navier-Stokes (RANS) turbulence models to investigate the importance of turbulence modelling for nasal inspiration at a constant flow rate of 250 ml/s. ... -
CFD Simulations of Wave Propagation and Shoaling over a Submerged Bar
(Journal article; Peer reviewed, 2015)The wave propagation over a submerged bar is simulated using the open source CFD model REEF3D and the numerical results are compared to the experimental data. The transformation of the wave resulting in higher harmonics ... -
CFD Simulations to Determine Wave Forces on a Row of Cylinders
(Journal article; Peer reviewed, 2015)The open source Computational Fluid Dynamics (CFD) model REEF3D is used to simulate interaction of low steepness linear waves and high steepness 5th-order Stokes waves with a single cylinder and linear arrays of two, three, ... -
CFD Study of Diffuse Ceiling Ventilation through Perforated Ceiling Panels
(Peer reviewed; Journal article, 2020)Diffuse Ceiling Ventilation (DCV) is a promising concept to address internal air quality and thermal comfort requirements in contemporary buildings. Sound-absorbing perforated ceiling panels are common in office rooms and ... -
CFD Study on Continuous Tapping of Silicon
(Peer reviewed; Journal article, 2022)Silicon is mostly produced in rotating submerged arc furnaces with continuous tapping of metal. The burden is often dense due to condensates. Thus, furnace gas does not escape easily to the top of the burden and some gas ... -
CFD study on the effect of Archimedes number and heating rate on the thermal stratification of a ventilated office
(Chapter, 2018)This paper dealt with simulating a typical occupied office equipped with displacement ventilation using CFD method. The STAR-CCM+ commercial software was employed for performing the simulations in order to analyze the trend ... -
CFD-based design algorithm for CO2 ejectors
(Chapter, 2021)In this work, a novel CFD-database generation algorithm for CO2 ejectors are presented. The algorithm is explained and its details discussed. A case for CFD database generation is then performed based on an ejector design ... -
CFD-DEM simulation of biomass gasification with steam in a fluidized BEd reactor
(Journal article; Peer reviewed, 2015)A comprehensive CFD–DEM numerical model has been developed to simulate the biomass gasification process in a fluidized bed reactor. The methodology is based on an Eulerian–Lagrangian concept, which uses an Eulerian method ... -
CFD-DEM simulation of biomass pyrolysis in fluidized-bed reactor with a multistep kinetic scheme
(Peer reviewed; Journal article, 2020)The pyrolysis of biomass in a fluidized-bed reactor is studied by a combination of a CFD-DEM algorithm and a multistep kinetic scheme, where fluid dynamics, heat and mass transfer, particle collisions, and the detailed ... -
CFNN-PSO: An Iterative Predictive Model for Generic Parametric Design of Machining Processes
(Journal article; Peer reviewed, 2019)Every production process consists of a large number of dependent and independent variables, which substantially influence the quality of the machined parts. Due to the large impact of process variabilities, it is difficult ...