Hayder A Abdul Bari, Mohd Azimie Ahmad and Rosli Bin Mohd Yunus
Keywords: Waste, paddy husk fiber, closed loop, galvanized iron pipe, reduce drag. INTRODUCTION The addition of minute amounts of additives such as surfactants, polymers or rigid particles can result in important drag reduction effects in many types of flows. Most of the existing literature dealing with drag reduction by additives has focused on wall-bounded flows such as pipe flows, due to their importance in many technological processes. For this class of flows, there was a special interest in
Abstract: Abundant of waste from rice production in Malaysia have become the trigger for this investigation. Paddy husk are the waste from the rice production. Utilization of this waste in transportation of fluid can reduce the pressure drop in pipelines. Several studies have shown that addition of minute quantities of fiber additives can reduce the drag in pipe and maintain the pressure drop along the pipelines. Experimental works have been conducted in the laboratory in order to test paddy husk fibers in a closed loop of turbulence water flowing system. Flow tests were conducted using water as the transport liquid. The experimental work starts by pumping water from reservoir tank that had mixed with paddy husk fibers was pumped with six different flow rates in same pipe diameters a (0.025m ID). The types of pipe used are galvanized iron pipe. The testing length of this flow system is 1.0m. The pressure drop and drag reduction were measured in the flow varying concentrations of fiber (paddy husk). After adding the fibers to the water, the results have shown that the percentage drag reduction (Dr%) of 32% at the first flow rate setting and become depleted in term of the reading after travel at larger flow rate setting, but still there was drag reduction involve during transportation of the water.The results have shown that the fibers (paddy husk) have an effect on the pressure drop. In addition to this, we point out that the paddy husk fiber is available as drag reducing agent.
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