Luleå University of Technology is in strong growth with world-leading competence in several research areas. We shape the future through innovative education and ground-breaking research results, and based on the Arctic region, we create global social benefit. Our scientific and artistic research and education are conducted in close collaboration with international, national and regional companies, public actors and leading universities. Luleå University of Technology has a total turnover of SEK 1.9 billion per year. We currently have 1,840 employees and 17,670 students. In the coming years, multi-billion sums will be invested in Norrbotten and Västerbotten in large projects aimed at a more sustainable society nationally as well as globally. Luleå University of Technology is involved in several of these highly topical research projects and the social transformation that follows. We have a wide range of training to match the skills that are in demand. We hope you will help us build the sustainable companies and communities of the future. Take the chance to become part of the competence center AdTherM - Advanced Computing for Sustainable Thermal Management in Industry - together with us on flow theory at Luleå University of Technology. We are now looking for three PhD students in the areas of multiphase flow and convective mass and heat transport. You will be part of a strong network where industry and academia collaborate to develop and design next-generation technologies for the sustainable management of heat in industrial processes. Project description We are now looking for three PhD students, one for each of the following three projects: Transport of individual droplets in industrial environments The focus of this project is to develop and validate numerical models for individual droplets in industrial environments such as pressurized environments, with varying temperature and humidity. Modeling of phase transformation, formation of droplets and interaction between droplets and surfaces are central areas of the project, where the goal is to improve the models currently used in industry. The modeling can be performed with DNS/LES/LBM and with increasing complexity in terms of flow, surface properties, phase transformation and influence from nearby droplets. In the first instance, water droplets will be studied, but metal droplets can also be considered. Optimal heat transfer and heat recovery taking into account detailed geometries, surface structures and wall treatments In this project, models are developed that describe heat transfer for detailed geometries, surface structures and different types of wall treatments. Optimizing the geometries for improved heat transfer and heat recovery, as well as studying their sensitivity to, for example, incoming flow conditions are examples of questions in a first step. Methods for optimizing geometries with respect to heat transfer and heat recovery, and studies around incoming flow conditions. The models will be implemented, verified and validated with LES/DNS/LBM results and PIV/LES in reference cases, and may also be based on physics-informed neural networks (PINNs). In a second step, the focus is on heat transfer for various external textures including anisotropic surfaces and studies of secondary flows. In a third step, the effects of external treatments and pollution are taken into account. Reactive flow through a moving bed of porous particles A continuous model of the reactive flow through a moving bed of porous particles will be set up and run under different processing conditions. In parallel, a pair of representative cells is defined and the flow through these cells is modeled numerically with URANS/RANS, LES or LBM. This is done with increased complexity in terms of flow, heat, chemistry and relative motion of the particles. The results from the simulations with the representative cells are continuously fed into the continuum model. Methods for modeling the flow through individual porous particles will also be evaluated and experiments will be conducted where necessary. The work is carried out within the competence center AdTherM, which brings together a spectrum of partners and technologies with key roles in the sustainability chain. The center is a platform around models and methods for sustainable energy conversion, heat management and energy recovery. The project is carried out in close collaboration between academia, industry and small and medium-sized companies. Joint doctoral courses will be offered at the partner universities Lund University, the Royal University of Technology and Luleå University of Technology. The project is financed by VINNOVA. Job duties A doctoral position involves both theoretical and practical work. As a doctoral student, you are trained in scientific work in the form of publishing scientific articles in journals and at national and international conferences. You also study compulsory and voluntary doctoral courses. In addition, you can have the opportunity to try out the teaching role. As a researcher, you work as a neutral party in many contexts, which provides a fantastic opportunity to learn how to run challenging development projects. Qualifications We are looking for you who have a civil engineering, master's degree or equivalent in technical physics, space technology, mechanical engineering, energy technology or a related subject, preferably with courses at advanced level in flow science. The applicant should have good spoken and written English. Experience with numerical methods such as CFD and/or experimental work is advantageous. For further information on specific doctoral education, see study plans for postgraduate education within the Faculty of Technology Information Employment as a doctoral student is time-limited to 4 years, teaching and other department duties can add up to 20% of full time. Place of employment Luleå. Access by agreement. For further information, please contact assistant professor Anna-Lena Ljung, 0920 491320, anna-lena.ljung@ltu.se For full ad Job Vacancies Union representative: SACO-S Kjell Johansson, 0920 491529 kjell.johansson@ltu.se OFR-S Lars Frisk, 0920 491792 lars.frisk@ltu.se Application We prefer that you apply for the position via the application button below where you attach a personal letter as well as a CV/résumé and copies of verified diplomas. Please mark your application with the reference number below. Both the application and degree certificate must be written in Swedish or English. Application deadline: 26 May 2024 Reference number: 1803-2024