Blar i Bergen Open Research Archive på forfatter "Kosinski, Pawel Jan"
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Cohesive collisions of particles in liquid media studied by CFD-DEM, video tracking, and Positron Emission Particle Tracking
Saparbayeva, Nazerke; Chang, Yu-Fen; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Balakin, Boris; Struchalin, Pavel (Journal article; Peer reviewed, 2023)This paper investigates the cohesive collision of ice in an oil phase at temperatures ranging from −15.7 °C to −0.3 °C. The new information on the coefficient of restitution (COR) was obtained using three different velocity ... -
Direct absorption solar collector: Use of nanofluids and biodegradable colloids
Nguyen, Linna V.; Kosinski, Pawel Jan; Balakin, Boris; Kosinska, Anna Dorota (Journal article; Peer reviewed, 2023)In this paper, an experimental and numerical analysis was performed on both carbon black nanofluids and a biodegradable fluid in a novel pump-free direct absorption solar collector (DASC). In the experiments, the nanofluid ... -
Eulerian CFD model of direct absorption solar collector with nanofluid
Bårdsgård, Runa By; Kuzmenkov, Dmitriy M.; Kosinski, Pawel Jan; Balakin, Boris (Journal article; Peer reviewed, 2020)Solar energy is the most promising source of renewable energy. However, the solar energy harvesting process has relatively low efficiency, while the practical use of solar energy is challenging. Direct absorption solar ... -
Experimental and numerical investigation of direct absorption solar collectors (DASCs) based on carbon black nanofluids
Wei, Shihao; Espedal, Lisbeth; Balakin, Boris; Kosinski, Pawel Jan (Journal article; Peer reviewed, 2024)Direct absorption solar collectors (DASCs) typically achieve high efficiency due to the volumetric heat absorption process facilitated by the working fluids. In this study, carbon black (CB) nanofluids were utilized as the ... -
Experimental investigation of erosion due to nanofluids
Braut, Marthe; González-Fernández, Luis; Kosinska, Anna Dorota; Grosu, Yaroslav; Kosinski, Pawel Jan; Balakin, Boris (Journal article; Peer reviewed, 2022)The demand for efficient and sustainable energy is continuously increasing. Among the many technologies with great potential within this field are nanofluids. Nevertheless, there is still a considerable lack of information ... -
Experimental study of hydrogen production using electrolyte nanofluids with a simulated light source
Wei, Shihao; Hikmati, Javad; Balakin, Boris; Kosinski, Pawel Jan (Journal article; Peer reviewed, 2022)In this research, we conducted water electrolysis experiments of a carbon black (CB) based sodium sulfate electrolyte using a Hoffman voltameter. The main objective was to investigate hydrogen production in such systems, ... -
Exploring the use of nanofluids in pump-free systems for solar thermal applications
Kosinska, Anna Dorota; Balakin, Boris; Kosinski, Pawel Jan (Journal article; Peer reviewed, 2023)By using nanofluids as a working fluid in pump-free designs, thermal energy systems can become more efficient and have reduced maintenance costs, ultimately extending the system’s lifespan. In this paper, our goal is to ... -
Extension of the hard-sphere model for particle-flow simulations
Kosinski, Pawel Jan; Balakin, Boris; Kosinska, Anna Dorota (Journal article; Peer reviewed, 2020)Discrete element methods require appropriate models for particle-particle collisions. Usually, researchers use soft-sphere types of models where the collision dynamics is solved numerically. This makes the simulation ... -
Flow loop study of a cold and cohesive slurry. Pressure drop and formation of plugs
Struchalin, Pavel; Øye, Vegar Hovdenakk; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Balakin, Boris (Journal article; Peer reviewed, 2023)Slurries of cohesive particles constitute a significant risk during subsea petroleum production due to their potential to plug the flow. This article describes a flow loop study of a slurry consistent with 0.23-mm ice ... -
Investigation of nanofluids in alkaline electrolytes: Stability, electrical properties, and hydrogen production
Wei, Shihao; Balakin, Boris; Kosinski, Pawel Jan (Journal article; Peer reviewed, 2023)Utilizing solar energy efficiently and manufacturing hydrogen economically are the primary goals in the energy industry. In this paper, we present a novel method to solve both issues by exploiting the electrolysis of ... -
Non-invasive studies of multiphase flow in process equipment. Positron emission particle tracking technique
Balakin, Boris; Adamsen, Tom Christian Holm; Chang, Yu-Fen; Kosinski, Pawel Jan; Hoffmann, Alex Christian (Peer reviewed; Journal article, 2017)Positron emission particle tracking (PEPT) is a novel experimental technique for non-invasive inspection of industrial fluid/particle flows. The method is based on the dynamic positioning of a positron-emitting, flowing ... -
Numerical investigation of direct absorption solar collectors based on carbon black nanofluids
Wei, Shihao; Balakin, Boris; Kosinski, Pawel Jan (Journal article; Peer reviewed, 2023)A novel model of a rectangular direct absorption solar collector (DASC) based on carbon black (CB) nanofluids for concentrated solar power is presented herein. Distributions of temperature, velocity, volume fraction of ... -
A numerical study of flow field and particle deposition in nasal channels with deviant geometry
Thune, Eveline Løvaas; Kosinski, Pawel Jan; Balakin, Boris; Alyaev, Sergey (Journal article; Peer reviewed, 2021)Deviant geometry of nasal channels results in significant changes to nasal aerodynamics that alter flow resistance, sensation, and the ability to filter aerosols. The invasive, operative modification of nasal geometry might ... -
Photothermal conversion of biodegradable fluids and carbon black nanofluids
Kosinska, Anna Dorota; Balakin, Boris; Kosinski, Pawel Jan (Journal article; Peer reviewed, 2022)The paper is devoted to the topic of direct absorption solar collectors (DASCs). Various kinds of fluids can be used as heat transfer fluid in DASCs, and the main focus of our paper is on comparing nanofluids (water with ... -
Theoretical analysis of erosion in elbows due to flows with nano- and micro-size particles
Kosinska, Anna Dorota; Balakin, Boris; Kosinski, Pawel Jan (Journal article; Peer reviewed, 2020-02-05)The present paper focuses on the issue of erosion due to fluid flow laden with nano- and microparticles. We investigated the case of a pipe elbow using theoretical analysis and numerical simulations. For the case when the ... -
Use of biodegradable colloids and carbon black nanofluids for solar energy applications
Kosinska, Anna Dorota; Balakin, Boris; Kosinski, Pawel Jan (Journal article; Peer reviewed, 2021)The conversion of solar energy to heat can be performed in direct absorption solar collectors, where the radiation from the sun is absorbed by a fluid. There are various types of fluids that can be used, and recently, ...