Description:

Numerical simulations are increasingly being used to develop new and optimize existing products and devices. Numerical simulations can greatly reduce the number of prototypes needed and thus significantly accelerate and reduce development costs. Another sector where numerical simulations are used is a sector where it is difficult to verify ongoing physical processes (eg, heating the biological tissue under electrodes for direct brain simulation). Last but not least, based on numerical simulations, we can plan treatment where, based on knowledge of material properties, we can define the amount of power delivered to the device (eg radiofrequency ablation in oncology or cardiac surgery). Computer modeling involves the creation of geometry, setting of material properties and boundary conditions and, last but not least, the choice of differential equations, the method of discretization of the computing area and the processing of results. The accuracy of the results obtained, the length of calculations and the computational power requirements are very dependent on the numerical model setting. The lectures cover the most common problems in electrical engineering, thermics, mechanics, chemistry, acoustics and fluid dynamics. The acquired knowledge will be tested by the students when designing individual parts of devices and devices.

Contents:

1. Overview of the most frequently used numerical methods and finite element (FEM) and finite time domain (FDTD). Overview of SW for creating a real anatomical model.

2. Simulation of electrical and magnetic field for static and quasi-static applications (AC / DC Module), calculation of electric field distribution around the electrodes of pacemaker and electrosurgical device

3. Electromagnetic field simulation (RF Module), design and modeling of high-frequency devices

4. Equation of heat dissipation in biological tissues, in particular the Penetration Equation (Heat Transfer Module), Multiphysical simulations.

5. Finite Element Method

6. Acoustics Module, Thermoablation with High Intensity Focused Ultrasound

7. Fluid Mechanics - One Phase (CFD Module)

Seminar contents:

1. Introduction to Comsol Multiphysics, 3D geometry creation, grid and solver setting.

2. Calculating the electric field distribution around the pacemaker electrodes.

3. Modeling of the waveguide applicator for local hyperthermia and electromagnetic field generated in the biological tissue.

4. Extension of the previous model on temperature simulation in biological tissue.

5. Creation of a real anatomical model in the program Mimics and 3-Matic (Materialize).

6. Fluid Mechanics - one phase and more immiscible phases using the Level Set Method.

7. Light transmission in optical fiber. Creating a model in COMSOL Multiphysics, exporting and editing, executing simulations and analyzing results in MATLAB.

Recommended literature:

[1] COMSOL Multiphysics (COMSOL AB, Stockholm, Sweden)

[2] Reddy, J.N. (2006). An Introduction to the Finite Element Method (Third ed.). McGraw-Hill. ISBN 9780071267618.

Abbreviations used:

Semester:

• W ... winter semester (usually October - February)
• S ... spring semester (usually March - June)
• W,S ... both semesters

Mode of completion of the course:

• A ... Assessment (no grade is given to this course but credits are awarded. You will receive only P (Passed) of F (Failed) and number of credits)
• GA ... Graded Assessment (a grade is awarded for this course)
• EX ... Examination (a grade is awarded for this course)
• A, EX ... Examination (the award of Assessment is a precondition for taking the Examination in the given subject, a grade is awarded for this course)

Weekly load (hours per week):

• P ... lecture
• C ... seminar
• L ... laboratory
• R ... proseminar
• S ... seminar