CFD analysis optimization wind catcher

Hi Geeks, I had issues with my old account with setting up [login to view URL] again! I am looking for a CFD professional who can optimize a wind-catcher design for my home construction Current design has rectangular wind-catcher with 9 meter height from ground with x blade dividing the inside into 4 rectangular chambers. Purpose of CFD analysis is optimize wind-catcher geometry for building ground floor of 80 square meter. Design provided:Sketch up 3D MODEL Geometry: One duct on south side , facing the south side of building, open inside the building at the roof level, and not at the bottom .All other three ducts open at bottom. Condition 1 Stack effect ( no wind outside the whole wind-catcher act as a chimney, partition not considered in this case ,effective area 1.6x1.4 sq meter ) rate of ventilation for the area including living, dining (Study not included) . Consider maximum temperature difference of 8 degree Celsius between inside and outside the building and zero wind. What is the difference an opening with 1 m height x 1.6m vs. 2 meter x 1.6m makes? Assume all current opening on only south side of the facade are open for this condition. Condition 2 For the same wind-catcher design as above, boundary conditions changed to wind outside at 2-8 m/s from west side and northwest side and through X shaped partition, what is the air exchange rate wind-catcher provide to living , dining and study area , through one duct of near 0.56 sq meter ( 2.24sq meter rectangle area divided into 4 triangle, one working at a given time-west or NW ). Wind speeds change of 2 m/s increments is enough. Condition 3 Identify potential openings on north and south sides of the building envelope area, through which wind catcher supplies the optimum flow, avoiding stagnant pockets. Area around wind catcher (stair) is considered a continuation of living space. Please note only living, study and dining area on ground floor is included in these calculation. Provide flow paths and velocities through each room in optimized condition as results for above conditions. At the end of your evaluation, will need to provide all output, simulation files for verification using a standard cfd software, and also JPEG or similar image results with explanations of result for me to understand. Turbulence modeling using 3D steady Reynolds-Averaged Navier-Stokes (RANS) has been the most common approach for CFD simulations of wind catchers,in literature but please write me with suggestions on how you are planning it.