MB

M.Sc. Miguel Angel Ballesteros Martinez

  • Postanschrift: Kaiserstr. 12
    Liefer- und Besucheranschrift: Gotthard-Franz-Straße 3
    Geb. 50.31, 4. OG
    D-76131 Karlsruhe

About myself

I come originally from Colombia, where I finished both my Bachelor and Master in Chemical Engineering at the Universidad de los Andes. Since my Bachelor, I focused on Computational Fluid Dynamics (CFD) and process modelling. After my Master, I worked for a couple years as a Process and CFD Engineer for the oil industry, mostly designing and developing extraction processes for oil fields. However, I have always had an interest for food engineering. During my Bachelor, I did an internship at the largest brewery in Colombia, Bavaria S.A. I also did a research stay at the LVT in 2018, where I worked on the simulation of atomizers for spray drying. I started my PhD project in November 2020 on the same subject.

 

Research focus

Fluid atomization is an important unit operation that is normally used to improve heat and mass transport in various fields and industries, such as combustion technology, surface coating, and spray drying. There is a large variety of atomizers, but the process functions of most of them are not yet understood. One such type of atomizer is the Air-Core-Liquid-Ring (ACLR)-atomizer. Studies with the ACLR-atomizer show that it requires less airflow and energy than other twin fluid nozzles when handling fluids with high viscosity or high solid contents. It is for this reason that my research focuses on understanding the relation between geometry parameters, process conditions and product properties during atomization with an ACLR nozzle.

 

Methods

The study is divided into an experimental analysis and a numerical modelling of the system, both of which will be performed simultaneously. Atomization tests can be carried out at the institute's own spray stand, which enables online measurement of the spray droplet size distribution by means of laser diffraction spectroscopy. The Institute’s computational facilities, as well as the bwUniCluster, will be used to simulate the internal and external flow conditions of the atomizer.

 

Publications


2021
Analysis and Modeling of Liquid Holdup in Low Liquid Loading Two-Phase Flow Using Computational Fluid Dynamics and Experimental Data
Ballesteros, M.; Ratkovich, N.; Pereyra, E.
2021. Journal of energy resources technology, 143 (1), Art.-Nr.: 012105. doi:10.1115/1.4047604
2019
Applying PBL methodologies to the chemical engineering courses: Unit operations and modeling and simulation, using a joint course project
Ballesteros, M. A.; Daza, M. A.; Valdés, J. P.; Ratkovich, N.; Reyes, L. H.
2019. Education for chemical engineers, 27, 35–42. doi:10.1016/j.ece.2019.01.005

Presentations


2022
Experimental Analysis and CFD Modelling of the Flow Conditions inside an Air-Core-Liquid-Ring Atomizer
Ballesteros Martinez, M.; Gaukel, V.
2022, June 9. 9th International Conference on Fluid Flow, Heat and Mass Transfer (FFHMT 2022), Niagara Falls, Canada, June 8–10, 2022
2019
Analysis and Modelling of Liquid Holdup in Low Liquid Loading Two - Phase Flow Using CFD and Experimental Data
Ballesteros, M.; Ratkovich, N.; Pereyra, E.
2019, May 20. 10th International Conference on Multiphase Flow (ICMF 2019), Rio de Janeiro, Brazil, May 19–24, 2019
2018
Analysis of Low Liquid Loading Two - Phase Flow Using CFD and Experimental Data
Ballesteros, M.; Ratkovich, N.; Pereyra, E.
2018, April 13. 3rd World Congress on Momentum, Heat and Mass Transfer (MHMT 2018), Budapest, Hungary, April 12–14, 2018

Posters


2022
Entwicklung eines numerischen Modells der Mehrphasenströmung innerhalb einer Air-Core-Liquid-Ring (ACLR) Zerstäuberdüse
Ballesteros Martinez, M. A.; Gaukel, V.
2022, February 21. Jahrestreffen der ProcessNet-Fachgruppen Mehrphasenströmungen, Mechanische Flüssigkeitsabtrennung sowie Zerkleinern und Klassieren (2022), Online, February 21–22, 2022
2021
Modelling and Analysis of the Effect of Process and Geometry Parameters on Multiphase Flow Formation in ACLR Atomizers
Ballesteros Martinez, M.; Ellwanger, F.; Wittner, M.; Gaukel, V.
2021, March 10. Jahrestreffen der ProcessNet Fachgruppen Mehrphasenströmung (MPH) und Computational Fluid Dynamics (CFD 2021), Paderborn, Germany, March 9–10, 2021

Proceedings


2022
Experimental Analysis and CFD Modelling of the Flow Conditions inside an Air-Core-Liquid-Ring Atomizer [in press]
Ballesteros Martinez, M.; Gaukel, V.
2022. Proceedings of the 9th International Conference of Fluid Flow, Heat and Mass Transfer (FFHMT’22), June 08 - 10, 2022 | Niagara Falls, Canada. doi:10.11159/ffhmt22.157
2018
Analysis of Low Liquid Loading Two-Phase Flow Using CFD and Experimental Data
Ballesteros Martínez, M. Á.; Ratkovich, N.; Pereyra, E.
2018. Proceedings of the 3rd World Congress on Momentum, Heat and Mass Transfer, Avestia Publishing. doi:10.11159/icmfht18.123