Institute of Mechanics

Position: Assistant Professor / Head of Project

Department: Mathematical modeling and numerical simulations

Room number: 320

Phone: +359 ...

E-mail: piliev@imbm.bas.bg

Links: ORCID; Google Scholar; LinkedIn

Scientific degrees:

PhD.: Computational Physics of Engineering Materials; ETH Zurich, Switzerland; Supervisor: Prof. Hans Herrmann; Title: "Mechanical Behavior of Confined Granular Materials"; 2019.

MSc.: Numerical Methods and Mathematical Modelling; Faculty of Mathematics; Sofia University, Bulgaria; Title: "Numerical Investigation of the Wetting of Random Rough Surfaces"; 2015.

BSc.: Applied Mathematics; Faculty of Mathematics; Sofia University, Bulgaria; 2014.

Fields of Research:

Publications:

1. Iliev S., Pesheva, N., Iliev, P., Roughness exponents of the liquid/vapor/solid contact line on surfaces with dilute random Gaussian defects: numerical study. The European Physical Journal E, 48 (6), 32, (2025)

2. Iliev, P., A numerical study on the effects of packed-bed thermal energy storage wall expansion and contraction. 18th Annual Meeting of the Bulgarian Section of SIAM BGSIAM'23, pp. 98 – 108, (2023)
   

3. Iliev, P., Numerical investigation of packed granular beds subjected to thermal cycling with application to thermal energy storage systems: a continuous approach. Granular Matter, 26 (4), 64, (2024)
   

4. Iliev, P., Pesheva, N., Iliev, S., Contact angle hysteresis on nonwetting microstructured surfaces: Effect of randomly distributed pillars or holes. Physical Review E, 110 (2), 024801, (2024)
   

5. Iliev, S., Pesheva, N., Iliev, P.. Contact angle hysteresis on random self-affine rough surfaces in Wenzel's wetting regime: Numerical study. Physical Review E, 107 (2), 024802, (2023)

6. Iliev, S., Pesheva, N., Iliev, P., Dependence of the contact line roughness exponent on the contact angle on substrates with dilute mesa defects: numerical study. The European Physical Journal E, 45 (8), 66, (2021)
   

7. Iliev, P., Wittel, F., Herrmann, H., Inversion of force lines in fiber-reinforced jammed granular material. The European Physical Journal E, 44 (4), 58, (2021)
   

8. Iliev, S., Pesheva, N., Iliev, P., Depinning regimes and contact angle hysteresis of a drop on doubly periodic microtextured surfaces. Physical Review E, 101 (5), 052801, (2020)

9. Iliev, P., Giacomazzi, E., Wittel, F., Mendoza, M., Haselbacher, A., Herrmann, H., Behavior of confined granular beds under cyclic thermal loading. Granular Matter, 21 (3), 59, (2019)

10. Iliev, P., Wittel, F., Herrmann, H., Evolution of fragment size distributions from the crushing of granular materials. Physical Review E, 99 (1), 012904, (2019)

11. Iliev, P., Wittel, F., Herrmann, H., Discrete element modeling of free-standing wire reinforced jammed granular columns. Desiderata Geotechnica, Part of the book series: Springer Series in Geomechanics and Geoengineering ((SSGG)), pp. 147 – 150, (2019)

12. Iliev, P., Pesheva, N., Iliev, S., Roughness of the contact line on random self-affine rough surfaces. Physical Review E, 98 (6), 060801(R), (2018)

13. Iliev, P., Wittel, F., Herrmann, H., Discrete element modeling of free-standing wire-reinforced jammed granular columns. Computational Particle Mechanics, 5 (4), pp. 507 – 516, (2018)

14. Iliev, S., Pesheva, N., Iliev, P., Contact angle hysteresis on doubly periodic smooth rough surfaces in Wenzel's regime: The role of the contact line depinning mechanism. Physical Review E, 97 (4), 042801, (2018)

15. Pesheva, N., Iliev, S., Iliev, P., Wetting of doubly periodic rough surfaces in Wenzel’s regime. 13-th National Congress on Theoretical and Applied Mechanics NCTAM'17, MATEC Web of Conferences 145, 03006, (2018)

16. Iliev, P., Pesheva, N., Iliev, S., Contact angle hysteresis on sinusoidal grooved hydropillic surfaces. 12-th National Congress on Theoretical and Applied Mechanics NCTAM'13, (2013)

Conferences:

1. 18th Annual Meeting of the Bulgarian Section of SIAM (BGSIAM'23); Sofia, Bulgaria; 2023.
2. 5th International Conference on Particle-based Methods, Fundamentals and Applications (Particles 2017); Hannover, Germany; 2017.
3. 28th European Consortium for Mathematics in Industry (ECMI), Modelling Week; Lisbon, Portugal; 2015.
4. 110th Mathematics Applications Consortium for Science and Industry (MACSI); Limmerick, Ireland; 2015.
5. 43rd Spring Conference of the Union of Bulgarian Mathematics; Borovets, Bulgaria; 2014.
6. 6th National Student Conference in Physics; Plovdiv, Bulgaria; 2014.

Projects:

1. PROMYS-BG (Head of Project): "Investigation and optimization of packed-bed thermal energy storage technologies"; Number: КП-06-Д0 02/1; Total Funds: 804'605BGN; Duration: 2025 - 2029.
2. ON-DEM COST: "Open Network for DEM Simulations" COST Action - Local Funding; Number КП-06-КОСТ/7; Duration: 2025- 2026.

Institute of Mechanics tel.: +359 2 973 31 40; e-mail: office@imbm.bas.bg