Harie S. Jaya, I.N.G. Wardana, H. Nurkholis, W. Denny
The cavitation is created in complex and changeable physical phenomena, such as high speed, high pressure, multiple phases, phase transition, turbulence, and unstable features. Thus, the vapor fraction and pressure distribution have always been key problems in determining cavitation behavior and its role on the hydrolysis reaction. The aim of this study is to analyze the effect of water cavitations at various pressures on the hydrolysis reaction that breaks the oil into fatty acids and glycerol. Numerical simulations are performed to determine the flow-field characteristics of both inside and outside the nozzle of a submerged water jet. The factors that influence the cavitation intensity of pressure are simulated. The cavities were generated by injecting water via a nozzle into palm oil in the helle shaw cell, with volumes of 3ml at pressures varying between 2, 6, 10, and 16 MPa. Glycerol formed by the reaction in this study, prove that the cavitation generated energy greater than the energy of ester bond between carbon and oxygen. The turbulence kinetic energy plays important role in determining the cavitation energy. © June 2016 IJENS.
Brawijaya University, Jl. MT. Haryono 167, Malang, 65145, Indonesia; Department of Mechanical Engineering Education, Palangka Raya University, Jl. Yos Sudarso, Tunjung Nyaho, Palangka Raya, 73112, Indonesia
