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Computational investigations of baffle configuration effects on the performance of primary sedimentation tanks
Author(s) -
Shahrokhi Mahdi,
Rostami Fatemeh,
Md Said Md Azlin,
Sabbagh Yazdi Saeed Reza,
Syafalni Syafalni
Publication year - 2013
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/j.1747-6593.2012.00367.x
Subject(s) - baffle , clarifier , sedimentation , settling , flow (mathematics) , mechanics , computational fluid dynamics , geology , environmental science , marine engineering , engineering , environmental engineering , mechanical engineering , geomorphology , physics , sediment
To increase the performance of a primary sedimentation tank (clarifier), it is essential to have a uniform and calm flow field. The use of suitable baffle configurations may help forming favourable flow field and increase the efficiency of the primary sedimentation tank. To find the proper position and height of a baffle in a rectangular primary sedimentation tank, computational investigations are performed. Also, laboratory experiments are conducted to verify the numerical results, and the measured velocity fields that were by acoustic D oppler velocimeter ( ADV ) are used. The results of computational investigations performed in the present study indicate that the favourable flow field (uniform in the settling zone) would be enhanced for the case that the baffle position and height provide small circulation regions volume, or the recirculation region forms a small portion of the flow field and dissipate the kinetic energy in the tank.