نتایج جستجو برای: density of gas
تعداد نتایج: 21219869 فیلتر نتایج به سال:
We present an analytic approach to predict gas density and temperature profiles in dark matter haloes. We assume that the gas density profile traces the dark matter profile in outer parts of the haloes, as suggested by a number of hydrodynamic simulations. Under this assumption the hydrostatic equilibrium uniquely fixes the two free parameters in the model, the mass– temperature normalization a...
اکثر خطوط لوله انتقال gas-condensate در مناطق نفت خیز ایران، دارای قطر زیاد و تحت فشار بالا، درخارج از محدوده شرایط به کار رفته درایجاد مدل های دوفازی موجود می باشند. مدلهای فعلی، عموما براساس اطلاعات تجربی بدست آمده از لوله های کم قطر، در فشارهای پایین و تحت شرایط آزمایشی با مقدار مایع بیش از 10 ارائه گردیده اند. و به دلیل آنکه میزان مایع جمع شده در خطوط انتقال گاز و یا gas-condensate کمتر ازا...
We have created a high-density gas of interacting positronium (Ps) atoms by irradiating a thin film of nanoporous silica with intense positron bursts and measured the Ps lifetime using a new single-shot technique. When the positrons were compressed to 3.3 x 10(10) cm-2, the apparent intensity of the orthopositronium lifetime component was found to decrease by 33%. We believe this is due to a co...
We use hydrodynamical simulations of disk galaxies to study relations between star formation and properties of the molecular interstellar medium (ISM). We implement a model for the ISM that includes low-temperature (T < 104 K) cooling, directly ties the star formation rate to the molecular gas density, and accounts for the destruction of H2 by an interstellar radiation field from young stars. W...
We propose a new method to describe the interacting bose gas at zero temperature. For three-dimensional system the correction to the groundstate energy in density is reproduced. For two-dimensional dilute bose gas the groundstate energy in the leading order in the parameter | ln α2ρ|−1 where α is a scattering length is obtained.
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