Infračervené Monte Carlo Vykreslování pro Simulace Tepelných Přechodů

• Thesis title in Czech: Infračervené Monte Carlo Vykreslování pro Simulace Tepelných Přechodů
• Thesis title in English: Infrared Monte Carlo Rendering for Heat Transfer Simulations
• Key words: Monte Carlo Vykreslování|Infračervené Vykreslování
• English key words: Monte Carlo Rendering|Infrared Rendering
• Academic year of topic announcement: 2023/2024
• Thesis type: dissertation
• Thesis language: čeština
• Department: Department of Software and Computer Science Education (32-KSVI)
• Supervisor: doc. Alexander Wilkie, Dr.
• Author: hidden - assigned and confirmed by the Study Dept.
• Date of registration: 28.02.2024
• Date of assignment: 28.02.2024
• Confirmed by Study dept. on: 05.03.2024

Guidelines

Current computer graphics knowledge is predominantly focused on simulating the interaction of electromagnetic radiation with matter in the visible spectrum, with the goal of creating realistic images for human observers. The same well established technologies can, at least in theory, be applied to simulate thermal processes. These simulations have a significant potential in the field of engineering, particularly in areas like heat management of buildings, for instance to allow accurate comparisons of various insulation types.

Recent research has demonstrated the potential of integrating radiative transfer with the other modes of energy transfer that occur, namely conduction and convection. The modes are coupled through single-coupled path space and they can be subsequently effectively solved using Monte Carlo algorithm.

Since the previous publications primarily focused on combining the three rather dissimilar modes into a single Monte Carlo simulation, they employ numerous simplifications for all three transport modes of thermal energy. The focus of this dissertation work is to expand upon the existing work, and to both verify this state of the art, and expand its utility by providing more realistic material models for such a simulation.

Our proposed contributions are twofold:

The inclusion of actual thermal measurements, and conducting a comparison of ground truth scenarios with the rendered images.
Enhancement of the existing model by removing some of the used simplifications, and thorough documentation of how these upgrades affect final image accuracy.

References

Tregan JM, Amestoy JL, Bati M, Bezian J- J, Blanco S, Brunel L, et al. (2023) Coupling radiative, conductive and convective heat-transfers in a single Monte Carlo algorithm: A general theoretical framework for linear situations. PLoS ONE 18(4): e0283681. https://doi.org/10.1371/ journal.pone.0283681

Mégane Bati, Stéphane Blanco, Christophe Coustet, Vincent Eymet, Vincent Forest, et al.. Coupling Conduction, Convection and Radiative Transfer in a Single Path-Space: Application to Infrared Rendering. ACM Transactions on Graphics, inPress, 42 (4), pp.1-20. 10.1145/3592121 . hal-04090428v2

Preliminary scope of work in English

The proposed progress on the dissertation research is as follows:

Year 1:
During the first year, our primary focus will be on utilising the Stardis software provided by the authors of the seminal 2023 SIGGRAPH paper that combines all three transport modes for infrared rendering. This will allow us to generate fundamental images, such as a ‘thermal Cornell box', which will serve as a foundation for our forthcoming experiments. Simultaneously, the focus will be on establishing a solid theoretical understanding of thermodynamics and advanced rendering. Furthermore, the exploration of potential model enhancements is planned, such as the incorporation of more precise BRDFs, either obtained from measurements or sourced from literature. We will also apply for a GAUK grant, in order to get some basic equipment, such as IR camera.

Courses: English, Mathematical Analysis 1 and 2, Thermodynamics course

Year 2:
During the second year, the effort should extend to the rendering of more complex scenes that can be faithfully recreated within the laboratory setting, providing images for comparative analysis. Further enhancements of the model will be pursued, focusing on inclusion of diffusion and absorption in the fluids. Initial findings and the preliminary model should be published.

Courses: Linear Algebra 1 and 2

Year 3:

In the third year, the emphasis will be placed on the publication of the achieved results (partial results might already be published by year two), as well as the continuation of efforts initiated in the second year. The second half of the year should be devoted to implementation of temperature dependence in modelling of solid surface radiative properties. We expect to develop an analytical model that should better depict the behavior of real solid surfaces.

Year 4:
In the final year, the completion of research topic and writing the dissertation thesis are expected.

The main focus of my PhD studies will be infrared rendering, however, depending on whether the graphics research group I am a part of continue to work in that area, I might also consult on physics questions of atmospheric and fog rendering papers, like I have in the past.