Page 22 - Book of Abstracts 2023

Thermal and hydraulic characterization of gravitational casting
Me-3-1
By: Stav Polti stavpo@ac sce ac ac il il Raz Gozlan razgz10@gmail com 1
2 3 Advisors: Dr Efraim Zemach Mr Eldar Shmuel
1Shamoon College of Engineering Beer-Sheva
2SNRC
3NRCN
Gravitational casting
represents a a a a a a a a a a a commonly applied manufacturing technique This project focuses on on on the the thermal and hydraulic characteristics of a a a a a a a a a a a a a a material after it is is is is poured into a a a a a a a a a a a a a a mold using experimental and numerical numerical methods The primary objective is is is to to develop a a a a a a a a a a a a numerical numerical model using ANSYS Fluent validated by experiments that enable the the prediction of manufacturing processes while optimizing and and improving the the product Our transient model resolves three physical phenomena: heat transfer phase change and and natural convection in in a a a a a a a a a a a a a a a correlated manner Currently this project is is is striving to improve the the the the reliability of of the the the the experiments for the the the the precise calibration of of the the computational model Keywords: ANSYS Fluent gravitational casting
heat transfer numerical modelling phase change Vibration control of an induced beam in in a a a a a stream
Me-3-2
By: Hod Asulin hod66913@gmail com com Sagi Numa saginuma96@gmail com Advisors: Dr Ziv Brand Mr Gal Tamsut Shamoon College of Engineering Beer-Sheva
External forces due to to water flow may cause significant oscillations and and accelerate failure factors such as fatigue and and fracture in in in flexible mechanical systems This project is is developing a a a a a a a a a a a a a a a a a a a a research-supporting system system system that simulates the causation of vibration by flow along a a a a a a a a a a a a a a a a a cantilever beam Our system system implements an an an active control approach for dampening vibrations by using actuators and and piezoelectric sensors The project includes the planning manufacturing and and and assembly of system components accompanied by numerical simulations and and analytical calculations A closed-loop control algorithm was also developed and model calibration experiments were performed Initial results show significant damping damping at at at the first resonance frequency Keywords: control damping damping inertial mass oscillations piezoelectric sensors vibrations 22