a high pressure drop happens when heavy oil with high viscosity moves through the oil pipeline. a variety of methods to avoid this pressure drop is available. one of which is injection of chemicals to reduce the viscosity and ultimately reduce pressure drop. using the pipesim software, the effect of dispersion of nano and micro-particles into the oil has been simulated to study the amount of th...

Between the various types of vegetable oils consumed, corn germ oil stands out, is characterized by benefits to human health and being considered raw material in Angola, due climatic characteristics these regions. It this context that present work was developed, which aims implement methodologies extract oil, having hydrated ethanol as solvent. The procedure consisted use Soxhlet, extractor, et...

Heat transfer from the internal surfaces of a vertical pipe to the adjacent air gives rise to the air flow establishment within the pipe. With the aim of optimizing the convective air flow rate in a vertical pipe, the details of the flow and thermal fields were investigated in the present study. Conservation equations of mass, momentum, and energy were solved numerically using simple implicit f...

The study on the flow behave inside of a ball valve is important for heavy crude oil transportation. Owe to the fast progress of the numerical technique, it becomes an effective way to observe the flows inside a valve and to analyze the flow structure of the oil-water core annular flow. In the present study, the simulation of the oil-water core annular flowing through the valve is conducted...

Characterizing the mechanism of drop formation at the interface of horizontal oilwater stratified flows is a fundamental problem eliciting a great deal of attention from different disciplines. We experimentally and theoretically investigate the formation and transition of horizontal oil-water stratified flows. We design a new multi-sector conductance sensor and measure multivariate signals from...

Subcritical water extraction (SWE) of essential oil from Matricaria Chamomilla L.  (M. Chamomilla L.) was performed and compared with conventional method including hydro distillation. The percentage of main extracted components of different temperatures (100, 125, 150 and 175 oc) and water flow rates (1, 2 and 4 ml/min) were investigated at 20 bar pressure and 0.50 mm mean particle size in SWE....

in this study, performance of oil droplet separator in crankcase ventilation system for three engines, ford-ecoboost (impactor with variable area), nissan-vq37de (inertial impactor), and peugeot-xu7 (cyclone) at the same volumetric flow rate has been studied experimentally. because of the complexities of geometrical and functional in internal combustion engines, a test rig is designed to study ...

A fully equipped automotive air-conditioning test system consists of 5 main components: a compressor, a condenser, an orifice tube, an evaporator and an accumulator. R-134a is used as refrigerant. The coefficient of performance, evaporator cooling capacity, compressor power consumption, total mass flow rate, vapor mass flow rate, liquid mass flow rate and oil in circulation, pressures and tempe...

Microscopic flow in fractured porous media is a typical problem for the exploitation of tight reservoirs. The rapid-flow in the fractured porous-media is of great significance to efficient and continuous oil/gas exploitation. The fractures are expected to enhance flow conductivity and mass transfer between matrix and fractures, and to improve oil displacement during water flooding. However, the...