Paper Information

Journal:   MODARES MECHANICAL ENGINEERING   MARCH 2017 , Volume 16 , Number 12 #F0074; Page(s) 125 To 134.
 
Paper: 

NUMERICAL ANALYSIS OF THE PERFORMANCE OF FOUR-SIDED WIND TOWER ATTACHED TO PARLOR AND COURTYARD IN DIFFERENT WIND INCIDENT ANGLES

 
 
Author(s):  DEHGHANI MOHAMMADABADI HOSSEIN, YAZDANFAR SEYYED ABBAS, DEHGHAN ALI AKBAR*, DEHGHANI MOHAMMADABADI ABOLFAZL
 
* DEPARTMENT OF MECHANICAL ENGINEERING, YAZD UNIVERSITY, YAZD, IRAN
 
Abstract: 

In this study, hydrodynamic behavior of four-sided wind tower attached to parlor and courtyard of a scaled model from existing historical house with wind incident angle as variable was numerically investigated. Hazire-ei house wind tower, which has six channels with rectangular cross section, integrated with parlor and courtyard is considered among the most typical ones in the vernacular architecture of Yazd city. This article seeks to investigate the performance of four-sided wind tower regarding suction and supply amount of air, and the way it was used as a vernacular solution for natural ventilation in order to provide engineers with design guidelines for contemporary use. Numerical study was conducted on a 1: 25 scaled model and for 13 wind incident angles with 15 degree intervals.
Interested parameters are mass flow rate and flow direction in each channel. A structured mesh was generated and ANSYS Fluent software was used for numerical simulation. Numerical modeling results were validated against experimental tests conducted on the same scaled model and good agreement wasobserved. Results indicate that in 61.5% of incident angels, four-sided wind tower acts to draw the air out of building and in other incident angels with approximately equal amount of supply and extract rate, it operates as an air exchange unit. Accordingly, it can be concluded that putting aside stack effects, four-sided wind towers in dry regions of Iran are mostly employed for heat dissipation rather than inducing outdoor cool breezes.

 
Keyword(s): NANOFLUID, MIXED CONVECTION, SINUSOIDAL CHANNEL, MAGNETIC FIELD, ENTROPY??GENERATION
 
References: 
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