DIRECT NUMERICAL SIMULATION STUDY ON RELATIONSHIP BETWEEN RANQUE-HILSCH EFFECT AND TURBULENCE IN HIGH-SPEED SWIRLING FLOW INSIDE A CYLINDRICAL VORTEX CHAMBER

The Ranque-Hilsch vortex tube (RHVT) is a device which can separate compressed gas into high and low energy flows only through its own fluid motion by generating a high-speed swirling flow inside a cylindrical vortex chamber.The energy separation phenomenon of RHVT is called the Ranque-Hilsch effect (RH effect).Although numerous studies have been c

Acute rheumatic fever (ARF) is more common in developing countries.ARF is a systemic disorder, which develops in children following group A streptococcal (GAS) pharyngitis.Rheumatic valvular disease is caused by autoimmune responses.Penicillin is used in the treatment of GAS tonsillopharyngitis and in primary and secondary prophylaxis against ARF.A

The means of assisting visually impaired and blind (VIB) people when travelling usually relies on other people.Assistive devices have been developed to assist in blind navigation, but many technologies require users to purchase more devices and they lack flexibility, thus making it inconvenient for VIB users.In this research, we made use of a mobil

Paul Y Takahashi,1,2 Euijung Ryu,3 Janet E Olson,3 Erin M Winkler,4 Matthew A Hathcock,3 Ruchi Gupta,3 Jeff A Sloan,3 Jyotishman Pathak,3 Suzette J Bielinski,3 James R Cerhan3 1Division of Primary Care Internal Medicine, 2Department of Internal Medicine, 3Department of Health Sciences Research, 4Center for Individualized Medicine, Mayo Clinic, Roch