Ariel Biofluid and Energy Lab

Hazan Shenberger and Avrahami Hazan Shenberger, Sapir, and Idit Avrahami. "The Effect of Mechanical Circulatory Support on Blood Flow in the Ascending Aorta: A Combined Experimental and Computational Study." Bioengineering 11.3 (2024): 238. Key points: This study investigates the effect of MCS on the aortic flow using combined experimental (PIV) and numerical (CFD) methods. Swirling flow reduces the TKE of the pump’s jet inlet and may reduce the risk of emboli being released from the aorta wall. A CCW rotating impeller induces a non-physiological CCW helical flow, while CW swirl combines better with the natural helical flow.

This study, conducted in Ariel Biomechanics Center (ABMC) at Ariel University, investigates the impact of aortic valve stenosis (AS) and transcatheter aortic valve implantation (TAVI) on coronary perfusion and potential coronary artery disease (CAD) based on analyses of in-vitro measurements of the time-dependent coronary flow. Shiri Polak Schreiber, Prof. Idit Avrahami and Prof. Yonatan Hasin for more information, https://iditavrahami.wixsite.com/mysite/

מסתבר ש-"אבקת החשמל" מהמליצה הצה"לית באמת קיימת, ולא באפסנאות אלא במעבדה של פרופ' עידית אברהמי, סגנית דקן הפקולטה להנדסה באוניברסיטת אריאל וחוקרת במחלקה להנדסת מכונות ומכטרוניקה. עידית, שותפה למחקר פרופ' אלכס שכטר וצוות הסטודנטים שלהם מפתחים תחליפים מבוססי ריאקציה של מים ואבקה, העתידים להחליף את הסוללות בהן אנו משתמשים היום.

Ariel Biomechanics Center (ABMC) Yuval Gabso, Idit Avrahami A Low Shear System for Development of Shear

A final Project (2021) by Amitai Shuman and Oren Argaman in the department of Mechanical Engineering, Ariel University, Israel Advisors: Prof. Idit Avrahami, Prof. Alex Schechter, M.Sc. Lev Zakhvatkin Production of Hydrogen from seawater and Sodium Borohydride, using a novel generator, with an energy density of 979 Wh/kg (compared to batteries with ~200 Wh/kg ). The generator provides hydrogen on-demand, it is safe and easy to use and refill. More information at: https://iditavrahami.wixsite.com/mysite iditav@ariel.ac.il

חן עמיהוד, אנטוניו ולדרמה, רועי דריינברג. בהנחיית פרופ' עידית אברהמי, המעבדה לביומכניקה באוניברסיטת אריאל Chen Anihood, Antonio Valderma, Roy Draynberg Supervisor: Prof. Idit Avrahami Ariel Biomechanics Center (ABMC), Ariel University, Israel

Michael Zolotih, Alex Schechter and Idit Avrahami Ariel University, Israel This movie presents a new type of hydrogen generator for "on-demand" use with hydrogen-based fuel cells. Hydrogen is produced in a catalytic hydrolysis reaction of sodium borohydride. The proposed generator is lightweight, has high energy density, efficient, portable, easy to use, refill, and clean. The described system consists of two main chambers, the upper chamber with sodium powder and the lower reaction chamber with a solution of water and catalyst. A peristaltic pump regulates the flow of water solution through a designated channel in the upper chamber with sodium borohydride and saturated solution drips into the reaction chamber. This system is significantly lighter and requires much less operating energy than other similar generators. To maintain constant H2 flow rate levels, the system controls continually solution temperature and H2 pressure in the reaction chamber. The mechanical and control systems were designed for long working periods and at different conditions, and with capabilities for restarting after prolonged rests. Experiments were carried out to prove system reliability and efficiency to allow commercial applications with a fuel density of 1296Wh/kg. This device has great potential for a variety of military, vehicle, and portable device applications.

Bar Vinder and Iray Ben Shahar - final project at ABMC 2020 An experimental system for evaluation of LVAD performance as a function of impeller design, supervisor: Prof. Idit Avrahami, dep. Mechanical Eng. Ariel University, Israel