Abstract The precessing vortex core (PVC), also known as rope, in a draft tube of Francis-99 hydro turbine is investigated. goal to increase our comprehension the root PVC order attenuate or suppress PVC, thus extending stable operational range below best efficiency point at part load conditions. Unsteady Reynolds-averaged Navier– Stokes simulations are conducted and used basis for all analyses...

background: chest tube removal is a painful procedure. the goal of this study was to evaluate the effect of cold application incombination with indomethacin suppository on chest tube removal pain in patients undergoing open heart surgery. materials and methods: this single-blind, double-group clinical trial was performed on 66 patients aged 18-68 years with thechest tube in pleural space. the i...

The present study was numerically inquired the heat transfer performance and fluid flow characteristic of a helical micro double-tube exchanger (HMDTHX) using finite volume method. tube length considered to be constantly equal 30 mm, 12 different configurations were modeled by changing in turn number pitch (P) for Reynolds numbers 50, 100, 150, 200. findings indicated that would enhance applyin...

Direct percutaneous endoscopic jejunostomy (DPEJ) is a useful method for the delivery of nutrition in patients with a variety of gastrointestinal (GI) problems [1–3]. However, DPEJ using standard colonoscopes or the push technique remains a technically challenging procedure, with success rates of about 68% in expert hands [2]. Herein, we present the key steps to conducting a successful DPEJ usi...