Environment Modelling and Building Physics

Indoor environment

Indoor environment modelling includes following types of analysis and studies:
  • Flow visualisation: flow patterns visualisation, flow strealines, iso-surfaces and velocity, temperature and turbulent intensity field contours/plots.

  • Air supply diffusers and components: assessment and optimisation of ventilation system components.

  • EN 15251 and EN 7730 indoor environment: Draught Rate (RD), Predicted Mean Vote (PMV) and Predicted Percentage Dissatisfied (PPD). Categorising the indoor environment (Classes I, II, III and IV).

  • ASHRAE 55 indoor environment: Standard Effective Temperature (SET) and Operative Temperature (Top).

  • Elevated velocity thermal comfort assessment, based on ASHRAE 55: Predicted Mean Vote (PMV) and Predicted Percentage Dissatisfied (PPD).


Indoor environment modelling could be performed for any mechanical, natural or hybrid ventilated space including following building types:
  • Enclosed spaces: enclosed bus and train stations, stadia, meeting halls, shopping centres, atrium spaces, universities, schools, office, houses, apartment buildings and others.



Research and science publications in the specific field of numerical simulations:

  1. "Numerical Investigation of Metabolic CO2 Distribution in an Occupied Ventilated Classroom", Simova I., Markov D., Mijorski S., Computational Engineering, 12th International Ph.D course under the patronage of DAAD, Germany, 2016
  2. "Airflow Modelling During Aeration with Windows and Doors Opening", Ivanov M., Mijorski S., Markov D., Scientific Papers of University of Ruse – chapter 51, sesion 1.2, 2012
  3. "Integrated Study on Indoor Environment Impact on Human Performance", Stankov P., D. Markov, G. Pichurov, I. Simova, R.A. Angelova, S. Logofetova, M. Ivanov, S. Mijorski, "Comfort and Health, and Effective Energy Utilization, Advances" in Bulgarian Science, 2012
  4. "Computational Grids", Mijorski S., Stankov P., Third International Course Proceeding, Numerical Heat Transfer Ph.D course under the patronage of DAAD, Germany, Kopaonik, Serbia, 01-06 October, 2011
  5. "Simulator of Metabolic CO2 Time Variation in Occupied Spaces Under Natural Ventilation", Mijorski S., CFD Based Design of Indoor Environment Course Proceeding, CLYMACADEMY course, Pamporovo, Bulgaria, 16-23 October, 2008


Full list research and science publications in the field of numerical simulations is presented here!

Continuous professional development in the specific field of numerical simulations:

  1. "OpenFoam General Programing", von Karman Institute for Fluid Dynamics, Belgium, 2016
  2. Engineering Skins 2013”, Department of Engineering, University of Cambridge, UK, 2013
  3. Numerical Heat Transfer”, DAAD / Departments of Mechanical Engineering, University of Niš, Serbia, 2011
  4. Computational Engineering”, DAAD / CERDECEN, Technical University of Sofia, 2011
  5. Indoor Air Quality and Human Body Exposure”, CERDECEN, Technical University of Sofia, 2009
  6. CFD based design of indoor environment”, CERDECEN, Technical University of Sofia, 2008


Full list of training courses and continuous professional development in the field of numerical simulations is presented here!

Figures and Videos

Indoor thermal comfort
Temperature field at different levels of an atrium space



Indoor thermal comfort
Mean Radiant Temperature field at different levels of an atrium space



Indoor thermal comfort
Velocity field at different levels of an atrium space



Indoor thermal comfort
Draught Rate field at different levels of an atrium space



Indoor thermal comfort
Predicted Mean Vote field at different levels of an atrium space



Air flow streamlines generation



Indoor thermal comfort
Velocity field - section at the center of an atrium space



Indoor thermal comfort
Temperature field - section at the center of an atrium space



Indoor thermal comfort
Thermal comfort fields in room with a virtual thermal manakin



Indoor thermal comfort
Thermal comfort fields in room with a virtual thermal manakin



Air flow streamlines generation



CO2 gas dispersion



Contact Us

SoftSim Consult Ltd. Mladost-4, bl.438 1715, Sofia Bulgaria


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smijorski@softsimconsult.com