T. Staffan Lundström
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Effect of momentum flow ratio on entrainment of a confined coaxial jet in a co-flow Open
Iron ore pellet production processes produce large amounts of CO2 emissions when burning fossil fuels. One example is the grate-kiln process, where normally a coal flame is used to indurate pellets. To mitigate the emissions, coal used in …
Investigating the Potential and Limitations of Cell Spacing Adjustment for Optimized Air-Based Battery Thermal Management Systems Open
A reliable battery thermal management system plays a crucial role in the safe, efficient, and long-term operation of a high-performance lithium battery system. This study evaluates the temperature rise, pressure drop, capacity loss, and cy…
3D flow and fibre orientation modelling of compression moulding of A-SMC: simulations and experimental validation in squeeze flow Open
Sheet Moulding Compound (SMC) based composites have a large potential in industrial contexts due to the possibility of achieving comparatively short manufacturing times. It is however necessary to be able to numerically predict both mechan…
Stormwater Uptake in Sponge-Like Porous Bodies Surrounded by a Pond: A Fluid Mechanics Analysis Open
In this work, a previously published model for the water up take of stormwater in sponge-like porous bodies by the group is further developed. This is done by investigating the highest-performing model and considering the water uptake from…
Modeling Convective Heat Transfer of Air in a Data Center Using OpenFOAM Open
Achieving energy and cooling efficiency in data center convective air flow and heat transfer can be a challenging task. Among different numerical methods to work with such issues is the Finite Volume Method in Computational Fluid Dynamics.…
A study on the effect of cell spacing in large-scale air-cooled battery thermal management systems using a novel modeling approach Open
Recent studies have revealed that effective thermal management systems are necessary to maintain the performance, lifespan, and safety of lithium battery systems. A unique and novel modeling approach is presented in this work with the aim …
Steady-State Transitions in Ordered Porous Media Open
Previously performed experiments on flow through an ordered porous media cell with tomographic particle image velocimetry reveal a complex three-dimensional steady-state flow pattern. This flow pattern emerge in the region where inertial s…
A comparative study on thermo-fluid characteristics of free and wall-bounded cross-flow heat exchangers Open
In recent years, wall-bounded cross-flow heat exchangers have gained significant attention for battery cooling applications. Due to similarities in geometry, these systems are often evaluated based on the heat and flow knowledge of free cr…
A dual-lattice hydrodynamic-thermal MRT-LBM model implemented on GPU for DNS calculations of turbulent thermal flows Open
Purpose The purpose of this paper is to present a fast and bare bones implementation of a numerical method for quickly simulating turbulent thermal flows on GPUs. The work also validates earlier research showing that the lattice Boltzmann …
Hybrid Modeling for Solutions of Sediment Deposition in a Low-Land Reservoir with Multigate Sluice Structure Open
At the multigate sluice structure on a fluvial river, undesired sediment deposition affects the normal operation of the reservoir in question. Physical and numerical models are hybridized to help explore flow and sedimentation patterns. Fi…
Experimental investigation of face mask filtration in the 15–150 <i>μ</i>m range for stationary flows Open
The effectiveness of face masks for preventing airborne transmission has been debated heavily during the COVID-19 pandemic. This paper investigates the filtration efficiency for four different face mask materials, two professional and two …
Design considerations to prevent thermal hazards in cylindrical lithium-ion batteries: An analytical study Open
Lithium-ion batteries have a high energy content, which makes them a great option for mobile storage applications. However, there are some serious concerns regarding their performance in terms of uncontrolled overheating. In this study, an…
The Effects of Periodicity Assumptions in Porous Media Modelling Open
The effects of periodicity assumptions on the macroscopic properties of packed porous beds are evaluated using a cascaded Lattice-Boltzmann method model. The porous bed is modelled as cubic and staggered packings of mono-radii circular obs…
Non-Stokesian flow through ordered thin porous media imaged by tomographic-PIV Open
The 3D flow-fields in a staggered and cubic arrangement of mono-radii cylinders are investigated using tomographic-PIV. The cylinder Reynolds-number is in the range of $$\approx 10$$ to $$\approx 800$$ giving an almost complete overview of…
Modeling the Swelling of Hydrogels with Application to Storage of Stormwater Open
The swelling effect in hydrogel bodies or sponge-like porous bodies (SPB) used in a specific stormwater storage concept of the down-flow type is considered. A macroscopic swelling model is proposed, in which water is assumed to penetrate i…
Flow and sediment behaviours and morpho‐dynamics of a diffluence−Confluence unit Open
A diffluence‐confluence unit is an elementary component within a river system and presents a complex yet linked pattern of both flow and sediment transport in between. This study deals, by means of field investigations and numerical modell…
Dynamic Distributed Storage of Stormwater in Sponge-Like Porous Bodies: Modelling Water Uptake Open
An innovative concept of dynamic stormwater storage in sponge-like porous bodies (SPBs) is presented and modelled using first principles, for down-flow and up-flow variants of SPBs. The rate of inflow driven by absorption and/or capillary …
Comparing Internal Flow in Freezing and Evaporating Water Droplets Using PIV Open
The study of evaporation and freezing of droplets is important in, e.g., spray cooling, surface coating, ink-jet printing, and when dealing with icing on wind turbines, airplane wings, and roads. Due to the complex nature of the flow withi…
Review of the Numerical Modeling of Compression Molding of Sheet Molding Compound Open
A review of the numerical modeling of the compression molding of the sheet molding compound (SMC) is presented. The focus of this review is the practical difficulties of modeling cases with high fiber content, an area in which there is rel…
A New Technical Concept for Water Management and Possible Uses in Future Water Systems Open
A new degree of freedom in water management is presented here. This is obtained by displacing water, and in this paper is conceptually explained by two methods: using an excavated cavern as a container for compressed air to displace water,…
Investigation of Hydrodynamic Dispersion and Intra-pore Turbulence Effects in Porous Media Open
The aim of the present paper is to evaluate and compare the pore level hydrodynamic dispersion and effects of turbulence during flow in porous media. In order to compute these quantities, large eddy simulations of turbulent flow in five un…
Experimental study of the internal flow in freezing water droplets on a cold surface Open
The study of a freezing droplet is interesting in areas, where the understanding of build up of ice is important, for example, on wind turbines, airplane wings and roads. In this work, the main focus is to study the internal motion inside …
Numerical Investigation of a Hydropower Tunnel: Estimating Localised Head-Loss Using the Manning Equation Open
The fluid dynamics within a water tunnel is investigated numerically using a RANS approach with the k- ε turbulence model. The computational model is based on a laser scan of a hydropower tunnel located in Gävunda, Sweden. The tunnel has a…