The present paper deals with the prediction of three-dimensional fluid flow and heat transfer in rib-roughened ducts of square cross-section. Such flows are of direct relevance to the internal cooling system of modern gas turbine blades. The main objective is to assess how a recently developed variant of a cubic non-linear model (proposed by Craft et al. (1999)), that has been shown to produce ...

Background Aortic Coarcatation (CoA) is one of the congenital heart diseases with the rate of 5-8% of Coronary heart diseases(CHDs). Balloon angioplasty is now one of the effective way of treatment for CoA, native or Re-coarctation (Re-CoA). We aimed to assess the immediate, and short term response to angioplasty and stenting, and also complications. Materials and Methods Balloon angioplasty wi...

The local structure, turbulence, and heat transfer in a flat ribbed duct during the evaporation of water droplets gas flow were studied numerically using Eulerian approach. structure turbulent two-phase underwent significant changes comparison with without ribs. maximum value gas-phase turbulence was obtained region downstream rib, it almost twice as high kinetic energy between Finely dispersed...

conclusions the present case appears to offer a safe and relatively simple method of balloon dilatation inside the lumen of the embolized fragment when the foreign body is too distal to retrieve with conventional snare systems. introduction increasing numbers of complex percutaneous coronary interventions have been accompanied by various intra-procedural complications. the fracture and emboliza...

soon after successful results of balloon valvuloplasty in treatment of congenital pulmonary stenosis, use of this technique for relief of congenital aortic stenosis (as) was attempted in different parts of the world. with the purpose of assessment the value of valvuloplasty in comparison with surgical valvotomy in relief of congenital as, we retrospectively studied 115 patients with valvar as, ...

background: percutaneous balloon mitral valvotomy (bmv) is the gold standard treatment for rheumatic mitral stenosis (ms) in that it causes significant changes in mitral valve area (mva) and improves leaflet mobility. development of or increase in mitral regurgitation (mr) is common after bmv. this study evaluated mr severity and its changes after bmv in iranian patients. methods: w e prospecti...

statement of problem comprehensive diagnosis is regarded as an important base for orthodontic treatment. an effective way to achieve a correct diagnosis is to compare the craniofacial skeleton of patients with normal cases in the same race through lateral cephalograms. purpose the present study was designed to determine the cephalometric norms of senior high school students in the city of hamed...

balloon angioplasty for aortic coarctation was introduced in 1979 for the fust time.1 this procedure soon became the choice treatment for restenosis of operated coarctation,2-5 but remains controversial for native (unoperated) coarctation. however, it seems to be rapidly becoming the intervention of choice for relief of unoperated coarctation as well. in this study, we evaluate the outcome of t...

critical pulmonary valve stenosis (cpvs) and atrial septal defect (asd) is an uncommon form of congenital heart disease. concurrent transcatheter pulmonary valvuplasty and closure of secundum atrial septal defect appears to be an interesting alternative to surgical correction. we present the simultaneous balloon valvuloplasty of critical pulmonary stenosis (ps) with supra systemic right ventric...