نتایج جستجو برای ' Numerical Modeling '

Analysis ,numerical modeling and artificial neural network of fixed platform jackets considering the height and period of the wave onto the platform The basis of neural network is on reaching correct results which is based on input data, in other words by observing the logical relations between inputs and outputs, we can find an almost correct result. The aim of using neural network in this study is to calculate the value of displacements, and finding a network in order to study and simplify t...

Numerical modeling of TANGAB dam under dynamic modeling The study of the stability of the earth dams in the field of earthquake is one of the most complex issues because of the variation of the effects of the earthquake characteristics (in terms of intensity, acceleration, frequency, effective performance time), fill material various properties (soil resistance factors and porosity pressure) and change of properties mentioned in the effect of seismic loads caused by the earthquake. Given the ef...

Pile group subjected to liquefaction (Numerical Modeling) In the past earthquakes, deep foundations of structures (piles) in the loose saturated sand and susceptible to liquefaction have experienced major damages with the incurred costs. These damages become more considerable in coastal lands with moderate slope when experiencing lateral spreading. In this study, the effect of lateral spreading on deep foundations is studied by numerical simulation using OpenSees code. The results of a physical...

In medium to heavy duty diesel engines, ever increasing power densities are threatening piston's structural integrity at high engine loads and speeds. This investigation presents the computational results of the heat transfer between piston and an impinging oil jet, typically used to keep the pistons cool. Appropriate boundary conditions are applied and using numerical modeling, heat transfer coefficient (h) at the underside of the piston is predicted. This predicted value of heat transfer c...

This paper presents a numerical study of natural convection cooling of two heat sources vertically attached to horizontal walls of a cavity. The right opening boundary is subjected to the copper–water nanofluid at constant low temperature and pressure, while the other boundaries are assumed to be adiabatic. The governing equations have been solved using the finite volume approach, using SIMPLE algorithm on the collocated arrangement. The study has been carried out for the Rayleigh number i...

Endotracheal stenting is a common treatment for tracheal disorders as stenosis, cronic cough or dispnoea episodes. However, medical treatment and surgery are still challenging due to the difficulties in overcoming potential prosthesis complications. In this work we analyze the response of the tracheal wall during breathing and coughing conditions under different stent implantations. A finite element model of a human trachea was developed and used to analyze tracheal deformability after prosthesi...

The increasingly growing world population and the contamination of rivers and coasts due to human activities have given rise to serious problems in the marine habitats. One of the most recent and challenging issues involves harmful algal blooms also known as red tides. The algal bloom has geographically spread in the entire coastal areas of the world, and the Iranian southern coast is no exception. However, any potential damage in coastal areas can be prevented by accurately predicting the dispe...

137Cs has been introduced to soils and groundwater over the past five decades by nuclear accidents, as fallout from nuclear testing, and as a byproduct-of nuclear research and weapons production. In this paper the transport phenomena involved in the leaching of radioactive material from a clayey soil has been investigated through the finite difference method. Modelling of the leaching processes which take place in clay barrier system is an invaluable tool as it is often not possible to conduct e...

A two dimensional model of a geosynthetic tube sitting on a rigid horizontal foundation and filled with several separated liquids with different densities is proposed. The material from which the tube is made is a special synthetic fabric which is inextensible, perfectly flexible, and leakproof. Such a model is useful for modeling a consolidations process in the tube filled with a slurry. The equilibrium equations of the model are formulated. Unknown values like the pressure on the top and botto...

A mechanically stabilized earth (MSE) wall behaves as a flexible coherent block able to sustain significant loading and deformation due to the interaction between the backfill material and the reinforcement elements. The internal behaviour of a reinforced soil mass depends on a number of factors, including the soil, the reinforcement and the soil/structure interaction and represents a complex interaction sol/structure problem. The use of parameters determined from experimental studies should all...