In this paper, the cell-centered finite volume method (CC-FVM) has been presented to simulate the axisymmetric radial flow toward a pumping well. The model is applied to the unstructured triangular grids which allows to simulate inhomogeneous and complex-shaped domains. Due to the non-orthogonality of the irregular grids, the multipoint flux approximation (MPFA) methods are used to discretize t...

primitive  neuroectodermal  tumor  (pnet)  of  kidney  is  an  extremely  rare  renal  neoplasm  with only about fifty reported cases in literature.  presumably,of neural crest origin, these tumors behave  aggressively  and  carry  a  poor prognosis.  we  report  a  case  of  22-year  old  female  patient complaining of left loin pain with recurrent hematuria for last 3 months. on clinical exam...

The unsteady free convection flow between two long vertical parallel plates withvariable temperature and mass diffusion in the presence of the thermal radiation hasbeen presented. The governing dimensionless coupled linear partial differentialequations on the flow are solved by using the Laplace transform technique. TheExact solutions have been obtained for the fluid velocity, temperature and t...

In this study, the performance of an irreversible regenerative Brayton cycle is sought through power maximizations using finite-time thermodynamic concept in finite-size components. Optimizations are performed using a genetic algorithm. In order to take into account the finite-time and finite-size concepts in the current problem, a dimensionless mass-flow rate parameter is used to deploy ti...

To investigate the relationship between sympathetic activity and blood flow in the kidney during propranolol treatment, 55 patients with uncomplicated essential hypertension were studied. Twenty-five of them had been treated with propranolol (average daily dose 240 mg) for about two weeks; the others served as untreated controls. In all patients renal arteriography was carried out, after which ...

To investigate the relationship between sympathetic activity and blood flow in the kidney during propranolol treatment, 55 patients with uncomplicated essential hypertension were studied. Twenty-five of them had been treated with propranolol (average daily dose 240 mg) for about two weeks; the others served as untreated controls. In all patients renal arteriography was carried out, after which ...

Patlak graphical analysis was applied to quantify renal cortical blood flow with N-13 ammonia and dynamic positron emission tomography. Measurements were made in a swine model of kidney transplantation with a wide range of normal and abnormal renal blood flows (N = 57 studies) and in 20 healthy human volunteers (N = 45 studies). Estimates of renal cortical blood flow by the Patlak method were c...

In this paper, the dynamic simulation for a high pressure regulator is performed to obtain the regulator behavior. To analyze the regulator performance, the equation of motion for inner parts, the continuity equation for diverse chambers and the equation for mass flow rate were derived. Because of nonlinearity and coupling, these equations are solved using numerical methods and the results are ...

In this study, the performance of an irreversible regenerative Brayton cycle is sought through power maximizations using finite-time thermodynamic concept in finite-size components. Optimizations are performed using a genetic algorithm. In order to take into account the finite-time and finite-size concepts in the current problem, a dimensionless mass-flow rate parameter is used to deploy ti...

The renal blood vessels were studied for a cholinergic determinant of their response to renal nerve stimulation. In dogs anesthetized with morphine and chloralose, control values were: mean aortic blood pressure 147 ± 4 mm Hg, renal blood flow 257 ± 12 ml/min. Acetylcholine (ACh) in 1-, 10and 100-^tg doses (all drugs given into the renal artery) increased renal blood flow, whereas 1000 fig of A...