Browsing NTNU Open by Author "Solsvik, Jannike"
Now showing items 1-20 of 32
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A multifluid-PBE model for reactive bubbly flow: Applied to biofuel production via the Fischer- Tropsch synthesis operated in a slurry bubble column
Vik, Camilla Berge (Doktoravhandlinger ved NTNU;2018:291, Doctoral thesis, 2018)Summary of thesis: A multifluid-PBE model for reactive bubbly flow Although electricity is transforming the transportation sector, liquid fuels are believed to remain in demand in the near future. With the ... -
A multifluid-PBE model for simulation of mass transfer limited processes operated in bubble columns
Vik, Camilla Berge; Solsvik, Jannike; Hillestad, Magne; Jakobsen, Hugo Atle (Journal article, 2017)Modeling of reactive dispersed flows with interfacial mass transfer limitations require an accurate description of the interfacial area, mass transfer coefficient and the driving force. The driving force is given by the ... -
A bubble coalescence kernel combining the characteristics of the film drainage, energy, and critical velocity models
Ozan, Suat Canberk; Solsvik, Jannike; Jakobsen, Hugo Atle (Peer reviewed; Journal article, 2023)A novel coalescence kernel with high predictive properties is constructed to be used within the population balance framework. The kernel includes the product of a collision frequency term and a novel binary coalescence ... -
Characterization of vortical structures in a stirred tank
Arosemena, Arturo; Ali, Haider; Solsvik, Jannike (Peer reviewed; Journal article, 2022)Data obtained from large eddy simulations of single-phase, turbulent flow of Newtonian and shear-thinning fluids in a baffled stirred tank reactor are considered to identify and characterize vortical structures. The ... -
Chemical Reactor Investigations; Modeling, Implementation and Simulation
Solsvik, Jannike (Doktoravhandlinger ved NTNU, 1503-8181; 2014:12, Doctoral thesis, 2014)Applied to chemical reactor problems, this work involves mathematical modeling, analyzes of numerical methods, and simulation studies. The simulation results presented are based on in-house codes. The first part deals ... -
Computer vision aided investigation of complex fluid physics
Gjerstad, Konrad (Master thesis, 2023)Å forstå fysikken til flerfasestrømmen av bobler-i-væske er viktig for utviklingen av mange kjemiske og biokjemiske prosessindustrier. Denne artikkelen diskuterer hvordan dyp læring, for eksempel kunstige nevrale nettverk, ... -
Data-driven methods for the analysis of flow phenomena in baffled stirred tanks
Järvi, Alexander (Master thesis, 2024)Mekanisk omrørte tank er vanlig brukt som kjemiske reaktorer i et bredt spekter av industrielle prosesser, med mange forskjellige anvendelser. Etter hvert som kravet om høyere energieffektivitet eller produktrenhet øker, ... -
Determination of Breakage Parameters in Turbulent Fluid-Fluid Breakage
Herø, Eirik Helno; Forgia, Nicolas La; Solsvik, Jannike; Jakobsen, Hugo Atle (Journal article; Peer reviewed, 2019)Numerous sets of single‐particle breakage experiments are required in order to provide a sufficient database for improving the modeling of fluid particle breakage mechanisms. This work focuses on the interpretation of the ... -
Dissipation rate estimation in a rectangular shaped test section with periodic structure at the walls
La Forgia, Nicolas; Herø, Eirik Helno; Solsvik, Jannike; Jakobsen, Hugo Atle (Journal article; Peer reviewed, 2018)An experimental study of turbulent flow concerning the characterization of turbulence by two-point correlation and estimations of the turbulent dissipation rate is presented. The fluid used is deionized water and the test ... -
Effects of shear-thinning rheology on near-wall turbulent structures
Arosemena, Arturo; Andersson, Ronnie; Andersson, Helge Ingolf; Solsvik, Jannike (Peer reviewed; Journal article, 2021)Turbulent channel flow simulation of a shear-thinning fluid is considered – see Arosemena et al. (J. Fluid Mech., vol. 908, 2021, p. A43) – and compared with a Newtonian base case to reveal the effects of the shear-dependent ... -
Experimental Investigation of Single Bubbles Rising in Stagnant Liquid: Statistical Analysis and Image Processing
Kure, Ida Kristine; Solsvik, Jannike; Jakobsen, Hugo Atle; La Forgia, Nicolas (Peer reviewed; Journal article, 2021)Despite the large effort devoted to the study of single bubbles rising in a stagnant liquid, the complex phenomena involved have resulted in a large scatter in the terminal velocity. Providing new experimental data where ... -
Experimental Investigations of Single Oil Droplet Breakage in a Turbulent Water Flow
Herø, Eirik Helno (Doctoral theses at NTNU;2021:340, Doctoral thesis, 2021)Multiphase flow and the transient behavior of the dispersed phase is important to numerous industrial applications. Predictive modeling of the dispersed phase would be beneficial in designing, for example, phase separation ... -
Fluid Particle Coalescence: Film Drainage Modeling Including the Effect of Surface Rheology
Ozan, Suat Canberk (Doctoral theses at NTNU;2021:292, Doctoral thesis, 2021)Coalescence of fluid particles is an important phenomenon that plays a significant role in a wide range of natural and industrial processes. This work focuses on the film drainage models employed in coalescence modeling, ... -
An hp-adaptive quadrature method for irregular integrands: Application to the population balance equation birth term
Engh, Mathias; Solsvik, Jannike; Jakobsen, Hugo Atle (Peer reviewed; Journal article, 2019)The solution of the population balance equation requires the integration of several source terms. In the numerical weighted residuals methods, Gaussian quadrature is a natural candidate for numerical integration. Previous ... -
Interface mass transfer and properties of bubbly flows in a column with Newtonian and non-Newtonian liquids
Kure, Ida Kristine; Solsvik, Jannike; Jakobsen, Hugo Atle (Peer reviewed; Journal article, 2023)The mass transfer of gas–liquid systems is commonly reported through the volumetric mass transfer coefficient, , which is a function of several complex phenomena. To optimize the rate of mass transfer, increased knowledge ... -
Interfacial mass transfer and bubble hydrodynamics in bubble columns
Kure, Ida Kristine (Doctoral theses at NTNU;2023:420, Doctoral thesis, 2023)The interaction between gas–liquid or gas–liquid–solid phases exhibit complexity which for years have led researchers to study the intrinsic mechanisms involved. One important branch within multi-phase flow is the interfacial ... -
Interfacial mass transfer limitations in the Fischer-Tropsch synthesis operated in a slurry bubble column at industrial conditions
Vik, Camilla Berge; Solsvik, Jannike; Hillestad, Magne; Jakobsen, Hugo Atle (Journal article; Peer reviewed, 2018)At high catalyst volume fractions the Fischer-Tropsch synthesis (FTS) operated in a slurry bubble column (SBC) is driven into the mass transfer limited regime. This study utilized literature models for the gas-liquid mass ... -
Interfacial mass transfer limitations of the Fischer-Tropsch synthesis operated in a slurry bubble column reactor at industrial conditions
Vik, Camilla Berge; Solsvik, Jannike; Hillestad, Magne; Jakobsen, Hugo Atle (Journal article; Peer reviewed, 2018)At high catalyst volume fractions the Fischer-Tropsch synthesis (FTS) operated in a slurry bubble column (SBC) is driven into the mass transfer limited regime. This study utilized literature models for the gas-liquid mass ... -
Lagrangian modeling of mass transfer from a single bubble rising in stagnant liquid
Solsvik, Jannike (Journal article; Peer reviewed, 2018)A Lagrangian model has been derived that describes the size, species composition and velocity of an individual gas bubble as it ascends through a vertical column with stagnant liquid and exchanges mass with the other phase. ... -
Mass Transfer Coefficients and Bubble Sizes in Oxidative Ladle Refining of Silicon
Bjørnstad, Erlend Lunnan (Master thesis, 2016)The mass transfer of [Al] and [Ca] between three synthetic SiO_{2}-CaO-Al_{2}O_{3} slags, and 8N silicon, has been investigated to find the overall mass transfer coefficient k_{i,t} for the individual species. Samples were ...