The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, the flow of power-law fluid over a circular cylinder near a moving wall is simulated numerically using a finite volume method for different Reynolds numbers (Re = 1, 10, 40), gap ratios (G/D = 0.2–1.0), and power-law indices (n = 0.5–1.5). The effects of fluid inertia, wall proximity, and rheological property on the drag and lift coefficient, gap flow characteristics, and recirculation...
In the present study, combustion of fuel/air in the three-region (compact) porous burner is investigated experimentally and numerically under a variety of the operating conditions. Temperature profiles on the burner centerline, pressure drop, and burner efficiency were found. Moreover, the effects of excess air ratio and thermal load were evaluated. In addition to the experimental work, a 2-D numerical...
It is well known that thermal insulation is a leading strategy for reducing energy consumption associated with heating or cooling processes in buildings. Nevertheless, building insulation can generate high expenditures so that the selection of an optimum insulation thickness requires a detailed energy simulation as well as an economic analysis. In this way, the present study proposes an innovative...
There are many process parameters involved in the deep drawing of TWBs. Each parameter has different effects on the forming quality and intercrosses each other. It is difficult to establish the relationship between the process parameters and forming quality in traditional methods. The TWBs square box part of the same material with different thickness was taking as the research object, and the common...
In present paper it is tried to concentrate to the configurations of gas channels and gas diffusion layers influences on the performance of polymer electrolyte membrane fuel cell. At first, increasing the number of channels is considered and observed such that the best results are gained with the case of three channels. Afterward, effect of prominent GDLs is studied. The prominences size is one of...
The journal bearings are one of the main components of the rotating machines and always bear considerable weight and dynamic stresses. Bearing defect may cause bending and eventually axis fracture and, in some cases, lead to an increase in the temperature of other components. One of the most important challenges of this type of bearings is the instability of the oil film layer, which appears as oil...
The numerical solution of the heat equation is a particularly challenging subject in complex, practical applications such as functionally graded materials for which analytical solution is not available or hardly attainable. The Monte Carlo method is a powerful technique with some advantages compared to the conventional methods and is often used when all else fail. In this paper, we introduce the Finite...
In order to reveal the influence of medium viscosity on flow characteristics in rotary lobe pump, the flow of five media with different viscosities, ranging from 1 (cst) to 110 (cst) has been studied in this paper. Based on the dynamic mesh model and the deformation technology of local grid reconstruction, the effects of viscosity, gap structure and speed on flow rate and pressure were investigated...
Aerodynamic load is recognized as one of the most important factors, which has significant effect on fuel consumption, vehicle performance, and stability. Designing external car body to meet aerodynamic drag and stability requirements is one of the most challenging works in vehicle development process. In this paper, optimum design of rear-end parameters for a hatchback car is studied considering...
Slenderness is a remarkable geometrical characteristic of thin steel plates. When a slender plate is subjected to an axial compression loading, a mechanical behavior called buckling can occur, causing an out-of-plane displacement. This instability phenomenon can be divided into elastic buckling (linear) and elasto-plastic buckling (nonlinear), depending on dimensional, constructive, or operational...
The design scheme of open intake will often increase the shaft length and the height of wet-pit pump house when the range of intake water level varies relatively large. And if the pump house is far away from the discharge bay, a longer discharge pipe may be inevitable, and the arrangement of full passage model pumping system may exceed the allowed size of a specific test bench. Aiming at a long-shaft...
If a long period has passed after plastic wheel speed sensors were assembled into an automobile, the sensing error may occur when the outer holes of speed sensor crack and water enter through the crack. This not only may put the automobile into the danger of malfunctioning, but the driver may at the psychologically very anxious situation. To resolve this problem, an injection molding method that can...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.