1. Fluid dynamic simulation in the analysis of the microclimate
Konstantina Ntrenogianni, Mechanical Engineer – Energy Consultant, EXERGIA A.E.

2. Introduction- Objectives
Study method for the microclimate
Useful tools: computational methods
Introduction to ENVI-met (Urban environment simulation tool)
Simplified example with ENVI-met solving model

3. Computational Fluid Dynamic (CFD)
Fluid Flow Problems Solving - Analysis of flow field parameters:
Speed - wind direction
Temperature
Pressure
Humidity
Use of computing grid– discretization of space: All differential equations are solved in each cell of the grid following an iterative process
Input Data:
Meteorological parameters : initial conditions
Morphology and characteristics of urban space : boundary conditions
Result: temporal and spatial distribution of the requested bioclimatic parameters

4. Applying fluid dynamic simulation in the study of the microclimate
27th Elementary School of Piraeus

5. ENVI-met Model Three-dimensional analysis
Holistic approach : Modeling of all critical parameters interacting with one another
Plantings
Buildings - Urban morphology
Ground Cover materials
Water Surfaces

6. Collection of necessary information for the study area
Field research (boundary conditions)
Location - height of buildings
Building Materials
Location and type of plants
Ground Cover materials
Car traffic (pollutant sources)
Climatological data from the nearest weather station (initial conditions)
Temperature
Speed and Wind Direction
Relative humidity

7. Step 1: Archive of region insertion (SPACES program)

8. Step 1: Archive of region insertion (SPACES program)

9. Step 1: Archive of region insertion (SPACES program)

10. Step 2: Introduction of model parameters (ConfigWizard and Database)

11. Step 3: Output Management (LEONARDO program)

12. Step 3: Output Management (LEONARDO program)

13. Example of microclimate model resolution

14. Indicative Bibliography
Bioclimatic Upgrades Program for Public Open Spaces – STUDY GUIDE, CRES, 2011
Calculation and assessment tools of the microclimate of outdoor spaces, Chatzidimitriou Aggeliki, ARENEP, 2011
Design of outdoor urban spaces with Bioclimatic Criteria, Department Of Buildings CRES, 2004
An integrated simulation method for building energy performance assessment in urban environments, Xiaoshan Yang et.al., 2012
Use of cool materials and other bioclimatic interventions in outdoor places in order to mitigate the urban heat island in a medium size city in Greece, A. Dimoudi et.al., 2014

15. THANK YOU Konstantina Ntrenogianni Mechanical Engineer
Energy Consultant
EXERGIA S.A.
Omirou and Vissarionos 1, Athens
Tel: , Fax: