Improving Hydraulic Performance of Drip Irrigation Emitters Through CFD Analysis

Abstract

A drip irrigation system delicately nourishes plant roots by gently delivering water drop by drop, ensuring minimal water loss due to runoff or evaporation. This method allows soil particles ample time to absorb and retain the water, promoting optimal plant hydration. To enhance the efficiency of drip irrigation, a mesmerizingly detailed 3D solid model of a drip emitter was meticulously crafted using cutting-edge SolidWorks software, revolutionizing the irrigation system's performance. CFD simulation technique is used to understanding the internal flow behavior and optimum pressure inside the in -line drip irrigation emitters. Their labyrinth structures of channels are main cause of change in flow behavior and optimum pressure in the drip irrigation emitters. Standard k-ɛ model and Enhanced wall function are used to simulate the flow behavior in labyrinth channels. Key findings are the efficiency of triangular channel is greater than the other channels (rectangular, trapezoidal and circular) based on analysis of flow rate. The value of Discharge coefficient of these channels from CFD simulation present a relationship of kCircular>kTrapezoidal>kRectangular>kTriangular. When the channel shape is smooth (like a circular channel) than the higher value of k. The efficiency of triangular channel is greater than the other channels (rectangular, trapezoidal and circular) based on analysis of flow rate. Discharge is increased by 76%, 68.42%,66.67% and 39.39% for circular channel, Trapezoidal channel, rectangular channel and Triangular Channel respectively for pressure range of 1.02m of water head to 10.2m of water head.

Keywords

• computational fluid dynamics (cfd)
• hydraulic performance
• drip emitters
• drip irrigation