To give an impression of which kind of theses I supervise, I have listed them below along with download links. The authors are responsible for their own work. Feel free to contact them directly in case you have questions or are interested in some nerdy details.
My current PhD students
Kasper Gram Bilde, 2020-2022, Aalborg University / Alfa Laval
A wet scrubber is commonly used in the marine industry to remove sulphur and particulate matter from the engine exhaust gas. When the scrubber is operating in a closed-loop mode, the water is recirculated over the scrubber and therefore needs continuous cleaning to remove the particulate matter before being discharged into the Oceans and also to prevent clogging of sprayers. To reduce the time needed to separate the particulate matter from the water, agglomeration of the particulate matter is beneficial. The aim of the PhD study is to develop a numerical model describing the dilute particle-laden flow where particles can collide, agglomerate and break up. By successfully describing the multi-physics of the liquid-solid system, particle aggregates in a shear flow can be investigated which will be used for predicting and optimising particle aggregation and sedimentation applications. The multiphase model is developed using the open-source computational fluid dynamics application OpenFOAM.
Nick Høy Hansen, 2019-2021, Aalborg University / Alfa Laval
Different processes are today used onboard marine vessels to remove toxic gasses from the exhaust gas; however, large quantities of particle matter are still being discharged to the environment every year. To access this problem a wet electrostatic precipitator (ESP) can be used to remove the particles from the exhaust gas before being discharged. To minimize the wet ESP system and the time needed to separate the particles from the exhaust gas, particle charging, and forces applied to the different phases of the system are of great interest. The aim of the PhD study is to build a large-scale wet ESP system for a marine engine and develop a numerical model describing the different phenomena inside the system. By successfully describing the multi-physics of the electrostatic-gas-solid system, the particle migration from the gas-phase can be investigated which can be used for predicting and optimisation of the particle removal inside a wet ESP system under different conditions. The wet ESP model is developed using the open-source computational fluid dynamics application OpenFOAM.
Ali Yahyaee Nujukambari, 2018-2021, Aalborg University
Although thermally driven phase change phenomena have an essential role in large‐scale and small-scale applications as an efficient heat transfer mechanism, their simulation is still in its infancy. One of the main challenges in CFD modeling of two-phase flows is locating the interface position. Default formulation for simulating phase change uses the Volume Of Fluid (VOF) method as the interface description method. The main drawback of VOF is the smearing of the interface and the difficulty in obtaining sharp interfaces between the phases, which may lead to spurious flows and inaccurate results. In this project, to avoid smeared interfaces and have accurate results in the simulation of thermally driven phase change phenomena, Ali will extend a new formulation (a solver in OpenFOAM) for their CFD simulation, being capable of using two more accurate interface description methods (CLSVOF and isoAdvection) and adaptive mesh refinement.
Theses submitted by my PhD students
Theses submitted by my Master students
Fully-developed convective heat transfer and pressure drop in a Gyroid TPMS structure using CFD analysis, Lasse Christensen, Stefan Holebæk, Nisanthan Thanabalasingham, 2021, Aalborg University
Numerical investigation of the wavychannel geometry and its effect on heattransfer performance in naturalconvection flow, Andreas Stengaard Thorstensen, Bjørn Christian Dueholm, 2020, Aalborg University
Numerical optimisation of vortex generators in fin and tube heat exchangers, Florian Marcus Fries, Palle Lang Nielsen, 2019, Aalborg University
Theses submitted by my Bachelor students
Development of Impeller Design Procedure to Increase the Range of Application for the Grundfos Pump NK 32-125, Frede Malthe Lindquist, Kristoffer Holst, Maria Maigaard Paulsen, Sebastian Bruhn Petersen, 2020, Aalborg University
Development of a mathematicalmodel describing a vertical axiswind turbine, Annette Goth Kamstrup, Henrik Hove Hornum, Josep Torres Riera, Stefan Holebæk, 2019, Aalborg University