This thesis investigates the application of two different modeling techniques for simulating nuclear fuel rods: Constructive Solid Geometry (CSG) with Boolean operations in Serpent and mesh-based modeling in OpenFOAM. The purpose of the study was to evaluate how a mesh-based model performs compared to a CSG-based model when conducting simulations on a relatively simple geometric configuration. The reasons for using mesh-based geometry include the ability to couple Serpent with OpenFOAM, enabling simulations in both codes using the same geometry, and accommodating users who might be more comfortable with mesh-based software. By performing a direct comparison between the results from the two modeling methods, the project aimed to assess the accuracy, efficiency, and practical usability of mesh-based geometry in nuclear simulations. The results indicate that mesh-based modeling, particularly with finer mesh, can achieve a level of detail and accuracy comparable to that of CSG models. However, the simulations with finer mesh took significantly longer to complete, highlighting the need for careful consideration of mesh size depending on the specific requirements of the simulation. The study encompasses several critical aspects, including computational speed and the precision of the resulting simulation data. The analysis demonstrates that while mesh-based modeling offers high precision and flexibility, it is more computationally intensive. In contrast, CSG is faster and simpler to implement for less complex geometries, but may not adequately capture more intricate details. The conclusions suggest that mesh-based modeling can be a viable alternative for complex simulations, provided that the computational resources are available. By highlighting the potential and limitations of mesh-based modeling in comparison to traditional CSG techniques, the study provides valuable insights. Utilizing mesh-based models is highly advantageous when CFD simulations are planned, as it avoids the need to simulate one model in Serpent and another in CFD. Thus, mesh-based geometry is a promising toolkit for achieving high precision and efficiency in detailed and intricate simulations within the nuclear field.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:uu-532310 |
| Date | January 2024 |
| Creators | Skjöldebrand, Fredrik |
| Publisher | Uppsala universitet, Tillämpad kärnfysik |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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