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Logic and tasks

Logic of the project 

The main steps in the realisation of the project are described in the enclosed figure (click on the figure to enlarge it). These steps can be summarised as:
  • State of the art
  • Requirements of the model
  • Experiment design / dataset and monitoring requirements
  • Upgrade of BIOS facility. 
  • Model development 
  • Physical calibration & refinement of the model (special test room at VTT)
  • Physical validation in BIOS-3 & refinement of the model 
  • Bioaerosol calibration & refinement of the model (Special test room at VTT). 
  • Biological validation & refinement of the model (BIOS-3)/ 
  • Lessons learned and roadmap
In addition to the normal airflow fields and temperature distribution predictions, the objective was that the model takes also into consideration the different types of human bioaerosol emissions. The model developed was a three dimensional CFD (Computational Fluid Dynamics) model utilising a two-equation model for turbulence closure. The calculations were first made assuming normal gravity but the model allowed the gravity vector to be adjusted to reflect microgravity conditions. Experiments required to check the validity of simplifying assumptions as well as to find out the accuracy, the limitations and the development needs of the model. The initial calibration of the model was realised in a special test room at VTT’s laboratory in Finland. The aim was to ensure that the model provides a reliable picture of bioaerosol behaviour. The model has been refined as required, based on the results of the experiments.

The calibration was first realised using non-viable particles generated by conventional aerosol generators. After this first calibration with non-viable particles, the model was calibrated with biological particles using bacterial and fungal aerosols. Experiments were then realised in BIOS-3 facility in Krasnoyarsk, which is a closed ecosystem used to conduct confinement studies, for further validation and refinement.
These experiments were realized in two phases, first with non-viable particles and then with biological particles. Besides, the project developed a scientific and technical road map to plan further phases.

Tasks of the project 

The work was shared in 6 workpackages.

WP1 - Management (Leader MEDES)
Coordination and daily management of the project. 

WP2 - Scientific and technical roadmap (Leader SCK)
-  To Review of current knowledge on microbial contamination control in space crafts
-  To define a scientific and technical roadmap for space application

WP3 - BIOS facility management (Leader IBP)
- To provide access to BIOS facility.
- To upgrade the facility
- To operate the facility during the experiments. 

WP4 - Model developement and calibration (Leader VTT)
- To develop and calibrate the model. 

WP5 - Model validation in BIOS (Leader IBMP)
- Experimental validation in BIOS 

WP6 - Promotion and dissemination
(Leader MEDES)
- To promote and disseminate the results of BIOSMHARS towards the general public, the youngest, the scientific community and towards industrials.