The CRECK Modeling Group

Detailed kinetic mechanisms and CFD of reacting flows

Alessandro StagniAlessandro Stagni

Assistant Professor (RTDa)

Department of Chemistry, Materials, and Chemical Engineering, Politecnico di Milano

Phone: +390223994716

Fax: +390270638173

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Research interests

My research activity deals with the chemical-kinetic analysis of reacting systems of hydrocarbons, and is ultimately targeted at accommodating the information included in detailed kinetic mechanisms into large-scale computations. For this reason, my research interest is devoted, to a large extent, to the reduction of chemical kinetic mechanisms to a skeletal level, in such a way to allow their use for the numerical applications of interest. Starting from the lumping methodology to model the combustion and pyrolysis of hydrocarbons with a lower number of species, my work in the recent years has been first focused to attaining a further level of reduction through the implementation of approaches based on flux analysis and sensitivity analysis. As a result, a numerical tool for mechanism reduction, called DoctorSMOKE, has been finalized. Acquiring such a capability paved the way to carry out fundamental studies targeted at getting a deeper insight on the interaction between kinetics and fluid dynamics on the ignition behavior and pollutants formation. 

 

Teaching activities

 

Education profile

  • June 2017 - Present. Assistant Professor (RTDa) at Politecnico di Milano
  • July 2016 - June 2017. Postdoctoral research fellow at Politecnico di Milano.
  • February - November 2015. Visiting Student Researcher at Stanford University (Prof. Ihme's group)
  • November 2012 - July 2016. PhD in Industrial Chemistry and Chemical Engineering at Politecnico di Milano.
  • September - December 2011. Internship at Procter & Gamble. Process Engineer in R&D Microprocessing Department
  • 2009-2011. Double Degree in Chemical Engineering at Alta Scuola Politecnica (Politecnico di Milano - Politecnico di Torino). Multidisciplinary Project: "REPACK: Sustainable Packaging for Fast Moving Consumer Goods", sponsored by Procter & Gamble.
  • 2009-2011. Master of Science in Chemical Engineering at Politecnico di Milano. Thesis title: "Metodi Numerici di Calcolo Parallelo per la soluzione di reti di reattori". Advisors: Prof. Tiziano Faravelli and Prof. Alberto Cuoci
  • 2006-2009. Bachelor of Science in Chemical Engineering at Politecnico di Milano. Thesis title: "Modellazione di un impianto IGCC". Advisors: Prof. Tiziano Faravelli and Ing. Luca Mancuso (Foster Wheeler Italiana).

 

Selected publications

  • Stagni, A., Cuoci, A., Frassoldati, A., Ranzi, E., & Faravelli, T., Numerical investigation of soot formation from microgravity droplet combustion using heterogeneous chemistry. Combustion and Flame (2018), 189, 393-406. DOI:10.1016/j.combustflame.2017.10.029
  • Stagni, A., Brignoli, D., Cinquanta, M., Cuoci, A., Frassoldati, A., Ranzi, E., & Faravelli, T., The influence of low-temperature chemistry on partially-premixed counterflow n-heptane/air flames. Combustion and Flame (2018), 188, 440-452. DOI:10.1016/j.combustflame.2017.10.002
  • Stagni, A., Esclapez, L., Govindaraju, P., Cuoci, A., Faravelli, T., & Ihme, M., The role of preferential evaporation on the ignition of multicomponent fuels in a homogeneous spray/air mixture. Proceedings of the Combustion Institute (2017), 36(2), 2483-2491. DOI:10.1016/j.proci.2016.06.052
  • Stagni, A., Frassoldati, A., Cuoci, A., Faravelli, T., & Ranzi, E., Skeletal mechanism reduction through species-targeted sensitivity analysis. Combustion and Flame (2016), 163, 382-393. DOI:10.1016/j.combustflame.2015.10.013
  • Stagni A., Cuoci A., Frassoldati A., Faravelli T., Ranzi E., Lumping and Reduction of Detailed Kinetic Schemes: an effective coupling. Industrial & Engineering Chemistry Research (2014) 53 (22), 9004-9016. DOI:10.1021/ie403272f
  • Stagni A., Cuoci A., Frassoldati A., Faravelli T., Ranzi E., "A fully coupled, parallel approach for the post processing of CFD data through reactor network analysis", (2014) Computers & Chemical Engineering, 60, pp 197-212, DOI:10.1016/j.compchemeng.2013.09.002
  • Cuoci A., Frassoldati A., Stagni A., Faravelli T., Ranzi E., Buzzi-Ferraris G., Numerical modeling of NOx formation in turbulent flames using a kinetic post-processing technique, Energy & Fuels (2013), DOI:10.1021/ef3016987