نتایج جستجو برای: surface impact
تعداد نتایج: 1366497 فیلتر نتایج به سال:
The rapid growth in urban population is seen to create a need for the development of more urban infrastructures. In order to meet this need, natural surfaces such as vegetation are been replaced with non-vegetated surfaces such as asphalt and bricks which has the ability to absorb heat and release it later. This change in land cover is seen to increase the land surface temperature. Previous stu...
A novel computational fluid dynamics and molecular kinetic theory (CFD-MK) method was developed to simulate the impingement of a nanodroplet onto a solid surface. A numerical solution of the Navier–Stokes equation using a volume-of-fluid (VOF) technique was used to model nanodroplet deformation. Dynamic contact angle during droplet impact was obtained by molecular kinetic theory. This dynamic c...
Article history: Received 26 August 2014 Received in revised form 1 December 2014 Accepted 1 December 2014 Available online 26 December 2014
The most widely accepted definition of health impact assessment (HIA), from a consensus conference in Gothenburg organised by the World Health Organisation’s (WHO) European Centre for Health Policy, defines HIA as ‘a combination of procedures, methods and tools by which a policy, programme or project may be judged as to its potential effects on the health of a population, and the distribution o...
in this article, finite element method and ale formulation were used to numerically simulate impact of low-velocity specific projectiles with water surface. for the simulation, ls-dyna finite element code was used. material models which were used to express behavior of air and water included null material model. for the projectile, plastic-kinematics material model was applied. mie-gruneisen eq...
in the first part of this thesis we explored wetting and its dynamics for small droplets. first, we showed how a simple feature of water droplets on a surface, i.e. laplace pressure, can be exploited to build a micropump. we investigated capillary pumping in microchannels both experimentally and numerically. putting two droplets of different sizes at the in/outlet of a microchannel, will ge...
Prediction of hydrodynamic loads during water impact has great significance in the structural design of vehicle. Impact load of fast crafts with water surface and the slam force of waves on the members of offshore structure is common examples of this phenomenon. There is not any available theoretical tool to exactly handle this complicated phenomenon and the experimental procedures in the labor...
The response of an ocean general circulation model to several distinct parameterizations of the surface heat and fresh water uxes, which di er primarily by their representation of the oceanatmosphere feedbacks, is investigated in a realistic con guration for the North Atlantic Ocean. First, the impact of explicitly introducing oceanic information (climatological sea surface temperature) into th...
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