نتایج جستجو برای: temperature gradient

تعداد نتایج: 566595  

Journal: :Engineer: Journal of the Institution of Engineers, Sri Lanka 2010

2017
Rong Ren Juanjuan Ma Qiyun Cheng Lijian Zheng Xianghong Guo Xihuan Sun

Temperature gradients exist in the field under brackish water irrigation conditions, especially in northern semi–arid areas of China. Although there are many investigators dedicated to studying the mechanism of brackish water irrigation and the effect of brackish water irrigation on crops, there are fewer investigations of the effects of temperature gradient on the water–salt transport. Based o...

Journal: :Physical review letters 2008
Fernando Bresme Anders Lervik Dick Bedeaux Signe Kjelstrup

We investigate the response of bulk liquid water to a temperature gradient using nonequilibrium molecular dynamics simulations. It is shown that the thermal gradient polarizes water in the direction of the gradient, leading to a non-negligible electrostatic field whose origin lies in the water reorientation under nonequilibrium conditions. The dependence of the magnitude of the electrostatic fi...

Journal: :Physical review letters 2008
T Görler F Jenko

Nonlinear gyrokinetic simulations of microturbulence simultaneously driven by electron temperature gradient modes, trapped electron modes, and ion temperature gradient modes are presented, covering both electron and ion spatiotemporal scales self-consistently. It is found that, for realistic ion heat (and particle) flux levels and in the presence of unstable electron temperature gradient modes,...

Journal: :journal of solid mechanics 0
a behravan rad engineering department ,zamyad company,15km karaj old road, p.o 1386183741, tehran, iran

present paper is devoted to stress and deformation analyses of heated variable thickness functionally graded (fg) circular plate with clamped supported, embedded on a gradient elastic foundation and subjected to non-uniform transverse load. the plate is coupled by an elastic medium which is simulated as a winkler- pasternak foundation with gradient coefficients in the radial and circumferential...

Journal: :فیزیک زمین و فضا 0
مریم دوستی دانش آموخته کارشناسی ارشد آبخیزداری، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران محمود حبیب نژاد روشن دانشیار، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران کاکا شاهدی استادیار، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران میرحسن میریعقوب زاده دانشجوی دکتری علوم و مهندسی آبخیزداری، دانشگاه مازندران، ایران

global warming caused by human activity and climate change is one of the issues attracted that has attention of many climate scientists. the relationship between climate parameters should be used in climate change studies to understand the complex nature of the environment and predict changes in the future. the reliable tool to investigate climate change effects on different systems is using th...

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