Unser InstitutTeam
Meisam Soleimani

Dr.-Ing. Meisam Soleimani

Dr.-Ing. Meisam Soleimani
Adresse
An der Universität 1
30823 Garbsen
Gebäude
Raum
307
Dr.-Ing. Meisam Soleimani
Adresse
An der Universität 1
30823 Garbsen
Gebäude
Raum
307
Funktion
Gruppenleitung
Institut für Kontinuumsmechanik
  • Forschungsprojekte

    Improving Accuracy and Performance of Meshfree Methods

    • Numerical simulation of pile installation in a hypoplastic framework using an SPH based Method
      In this project, a 3D computational tool using smoothed particle hydrodynamics (SPH) is developed which based on a hypoplastic constitutive approach for the mechanical behavior of the soil. The numerical code is firstly validated against a benchmark problem. Then several test cases are simulated including monotonic and vibratory penetration of piles into the soil. A good agreement with the experimental observation is found. Additionally, the impact of pile running in the presence of sheetpiles (retainers) are investigated to see how pile running can alter the applied forces on the sheet piles. The simulation of such complex geotechnical problems which involve large deformation, material nonlinearity and moving boundary conditions demonstrates the applicability and versatility of the proposed numerical tool in this field.
      Leitung: Peter Wriggers
      Team: Meisam Soleimani, Christian Weißenfels
      Jahr: 2020

    Biomedical technology

    • Numerical simulation and experimental validation of biofilm formation
      In this Reserch , a state-of-the-art 3D computational model has been developed to investigate biofilms in a multi-physics framework using smoothed particle hydrodynamics (SPH) based on a continuum approach. Biofilms are in fact aggregation of microorganisms such as bacteria. Biofilm formation is a complex process in the sense that several physical phenomena are coupled and consequently different time-scales are involved. On one hand, biofilm growth is driven by biological reaction and nutrient diffusion and on the other hand, it is influenced by the fluid flow causing biofilm deformation and interface erosion in the context of fluid and deformable solid interaction (FSI). The geometrical and numerical complexity arising from these phenomena poses serious complications and challenges in grid-based techniques such as finite element (FE). Such issues are generally referred to as mesh distortion. Here the solution is based on SPH as one of the powerful meshless methods. SPH based computational modeling is quite new in the biological community and the method is uniquely robust in capturing the interface-related processes of biofilm formation especially erosion. The fact is that SPH is a versatile tool owing to its adaptive Lagrangian nature in the problems whose geometry is temporarily varying (dynamic). Moreover, its mesh-less feature is considered to be favorable in interpreting the method as a particle based one. Hence, it is quite straight forward to incorporate complex interactions and ad-hoc rules at the particle level into the method. This is the case for the problems with coupled governing equations with different time and length scale. In this thesis all different physics which account for biofilm formation have been implemented in the framework of SPH and one can say that this tool is purely SPH based. Besides the numerical simulation, experiments were conducted by our partners in the medical school of Hannover. The obtained numerical results show a good agreement with experimental and published data which demonstrates that the model is capable of predicting overall spatial and temporal evolution of the biofilms. The developed tool can be employed in either controlling the detrimental biofilms or harnessing the beneficial ones.
      Leitung: Peter Wriggers
      Team: Meisam Soleimani, Peter Wriggers, Meike Stiesch
      Jahr: 2013
    • Red blood cell simulation using a coupled shell-fluid analysis purely based on the SPH method
      If the rheological behavior of a Red-Blood-Cell (RBC) changes, for example due to some infection, it is reflected in its deformability when it passes through the microvessels. It can severely affect its proper function which is providing the oxygen and nutrient to the living cells. In this research project, a novel 3D numerical method has been developed to simulate RBCs based on the interaction between a shell-like solid structure and a fluid. RBC is assumed to be a thin shell encapsulating an internal fluid (Cytoplasm) which is submerged in an external fluid (blood plasma). The approach is entirely based on the smoothed particle hydrodynamics (SPH) method for both fluid and the shell structure. The method was motivated by the goal to benefit from the Lagrangian and meshless features of SPH in order to handle several complexities in the problem due to the coupling between the RBC membrane as a deformable elastic shell and interior/exterior fluids.
      Leitung: Peter Wriggers
      Team: Meisam Soleimani
      Jahr: 2017
      Laufzeit: 3 Jahre

    Finite element technology

    • The stress and fatigue analysis of the transportation line
      The conveyor of the production line in Salzgitter Flachstahl GmbH which carries the steel coils is going to be subjected to an extra load due to the bigger coil size. The objective is to do a structural analysis of the conveyor to see if the safety factor of structure is still in the allowable region. Since, the loading condition is naturally variable due to continuously feeding the moving conveyor with steel coils, a fatigue analysis is required in addition to an ordinary static analysis.
      Leitung: Peter Wriggers
      Team: Meisam Soleimani
      Jahr: 2018
  • Publikationen und Vorträge

    Doktorarbeit

    • M. Soleimani (2017): Numerical simulation and experimental validation of biofilm formationDissertation B17/1, Institut für Kontinuumsmechanik | Datei |

    Artikel in Journal

    • Meisam Soleimani, Christian Weißenfels (2021): Numerical simulation of pile installations in a hypoplastic framework using an SPH based methodComputers and Geotechnics
      DOI: https://doi.org/10.1016/j.compgeo.2021.104006
    • MeisamSoleimani, NikhilMuthyala, MicheleMarino, PeterWriggers (2020): A novel stress-induced anisotropic growth model driven by nutrient diffusion: Theory, FEM implementation and applications in bio-mechanical problemsJournal of the Mechanics and Physics of Solids
      DOI: 10.1016/j.jmps.2020.104097
    • M. Soleimani (2019): Finite strain visco-elastic growth driven by nutrient diffusion: theory, FEM implementation and an application to the biofilm growthComputational Mechanics
      DOI: 10.1007/s00466-019-01708-0
    • M. Soleimani, S. Sahraee, P. Wriggers (2018): Red blood cell simulation using a coupled shell–fluid analysis purely based on the SPH methodBiomechanics and modeling in mechanobiology
      DOI: 10.1007/s10237-018-1085-9
    • Meisam Soleimani, Peter Wriggers, Henryke Rath, Meike Stiesch (2016): Numerical simulation and experimental validation of biofilm in a multi-physics framework using an SPH based method
      DOI: 10.1007/s00466-016-1308-9
  • Lehrveranstaltungen-Vorlesungen
    Leibniz Universität Hannover
    SoSe 2020 Finite Elements II
    SoSe 2018 - SoSe 2019 Development of FEM codes via automated computational modelling
  • Auszeichnungen

    2017

    Promotion mit Auszeichnung
    2013 MARIO Stipendium vom Niedersächsischen Ministerium für Wissenschaft und Kultur (MWK)

 Education

  •  B.Sc. in Mechanical Engineering 2003-2007

      Mechanical Engineering Dept., Sharif University of Technology, Tehran, Iran.

  • M.Sc., in Mechanical Engineering 2007-2010

      Mechanical Engineering Dept., University of Tehran, Tehran, Iran.

  • PhD, in  Mechanical Engineering 2013-2017

   Institute of Continuum Mechanics (IKM), Leibniz University Hannover, Hannover, Germany.