Study of the Process, Design and Operating Parameters Effect on the Efficiency of the Process Mill
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- Konfidensielt 
The study is dedicated to a computational model for the process mill using finite element software precisely COMSOL Multiphysics 4.4. A finite element model of the process mill was constructed using dimensions similar to the actual process mill. The model was simulated under the current operating conditions of the process mill and was referred to as the reference simulation in this work. This gave us the basis for comparing the various effects on the relevant parameters on the process mill. The simulation was extended to cover the effects of some selected design, process, and operating parameters on the velocity magnitude, the velocity profile as well as the effect on the efficiency of the process mill. A major advancement in this regard was the different graphical display of results after computing the model with COMSOL multiphysics. The study of several parameters within affordable computational time was dependent on the mesh size. Furthermore, an algorithm was developed in order to determine the response time of temperature change inside the process mill through a particular location in the simulation domain. The effect of relevant process parameters and the thermocouple tip position on the lag in temperature transmission was studied for models without liners and models with tungsten carbide liners. The visualization of complete simulation data for each FE model was devised in Microsoft Excel. The effect of viscosity, hammer thickness, angle between adjacent hammers, distance between adjacent hammers, rotational frequency and number of hammers on the velocity magnitude and the efficiency of the FE model of the process mill were also studied through simulations.
Master's thesis in Environmental technology *KAR OK KONF 2019*