Different techniques have been used to achieve a high heat transfer rate. Among them, one of the advanced is suspension nanoparticles in base fluids as water and coated with aluminum titanium. The present work has carried out on double pipe exchanger twisted tape insert twist ratio (y/w = 4 6) thickness (0.8mm) for investigation nanofluid counter flow arrangement under turbulent conditions. com...

Numerical investigation for turbulent flow of nanofluid (Ethylene glycol/water-Al2O3) is carried out with a volume fraction 0.5%, 1%, and 1.5%. The diameter solid nanoparticles equal to 20 nm. range Reynolds number in this simulation from 6300 27500 through three-dimensional steel corrugated spirally tube. For enhancement the heat transfer performance internal horizontal tube, tube combined alu...

Abstract The development of rare-earth barium copper oxide (REBCO) coated conductors with an extremely high critical current density under ultra-high fields opens up a high-field path towards large-scale fusion. latest technology has inspired cable-in-conduit such as conductor on round core wires, twisted stacked tape cables and Rutherford outstanding current-carrying capacities. In order to re...

objective: this study compared the tension-free vaginal tape (tvt) and transobturator tape (tot) procedures for surgical treatment of stress urinary incontinence in women. materials and methods: this prospective non randomized clinical trial was conducted in vali-e-asr hospital from march 2001 to march 2005. a total of 71 patients with clinical and urodynamic diagnosis of stress urinary inconti...

BACKGROUND Laparoscopic stoma formation has gained wide acceptance as an alternative to open abdominal surgery. Although laparoscopic stoma formation has a low morbidity, complications have been reported. Contributing factors to these complications are twisting of the bowel, maturing the wrong limb, or both of these. In this report, we describe a simple technique that can reduce these complicat...