LARHYSS Journal
Volume 19, Numéro 2, Pages 57-67
2022-06-20
Numerical Assessment To Harvest Rainwater Through Core Cuts On A Flat Roof
Authors : Shah Syed Muzzamil Hussain . Al‑qadami Ebrahim Hamid Hussein . Mustaffa Zahiraniza . Teo Fang Yenn . Qamar Nadia . Nathani Azhar . Bilal Muhammad . Abdur Rehman Malik . Tasin Muhammad .
Abstract
An approach of rainwater harvesting (RWH) collected from the roof of a building provides the practical and effective utilization of rainwater which would ensure availability and sustainable management of water. Instead of flat slabs, architects have designed attic and inverted slabs, which can serve the purpose of rainwater catchments and allow water to fall into dedicated catchment areas. Herein the approach of rainwater collection through core-cut method on a flat slab has been analyzed on FLOW-3D based on the mean annual rainfall data of the Karachi City, Pakistan. The results of the numerical simulation ensured that the developed harvesting system had the capability to capture and deliver the collected water into the storage tank. It has been noticed that between time 0 and 54 seconds, the value of Q was 0, which referred that the rainwater took time to accumulate prior to flowing into the cuts. After t = 54 seconds, a sudden increment in the volume flow rate was observed. This was due to the rainwater that accumulated on the roof and started to go through the cuts. However, after t = 70 seconds, the volume flow rate became steady and very minor fluctuations in the flow rate were noticed.
Keywords
Rainwater harvesting ; RWH ; Core cuts ; Flat roof ; Sustainability ; SDG 6
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