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 NUMERICAL AND EXPERIMENTAL TAYLOR FLOW INSTABILITIES. IN NARROW GAPS AND THEIR RELATIONSHIP TO TURBULENT FLOW IN BEARINGS
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NUMERICAL AND EXPERIMENTAL TAYLOR FLOW INSTABILITIES. IN NARROW GAPS AND THEIR RELATIONSHIP TO TURBULENT FLOW IN BEARINGS

автор Dingfeng D. издательство Книга по Требованию Прочие виды транспорта
Cтраниц 232        мягкая обложка       
Аннотация:A question open to debate is whether the flow formations observed during Taylor instability regimes are, or are related to the actual “turbulence” as it is presently modeled in micro-scale clearance flows. Numerical and Experimental Taylor Flow Instabilities presents the relationship between the onset of Taylor instability and appearance of what is commonly known as “turbulence” in narrow gaps between two cylinders. A new model for predicting the flow behavior in long and short journal bearing films in the transition regime is proposed and verified. A comparison is made between the results of this model and the four most accepted turbulence models (Constantinescu, Ng- Pan, Hirs and Gross et al. ). FEATURES Flow patterns, velocity profiles and torques are presented in both Taylor and wavy vortex regimes. The formation and collapse of Taylor and wavy vortices are clearly observed.
Автор: Dingfeng D.
Издательство: Книга по Требованию
Год:2009
Цена:
3233 руб
Нет в наличии
Поиск: NUMERICAL AND EXPERIMENTAL TAYLOR FLOW INSTABILITIES. IN NARROW GAPS AND THEIR RELATIONSHIP TO TURBULENT FLOW IN BEARINGS
НОВЫЙ ГОД СИМВОЛ 2013 ГОДАУКРАШЕНИЯ
КАРНАВАЛ НА НОВЫЙ ГОД РАСПРОДАЖА
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Управление денежными потоками

В Германии ученые трактуют эту категорию как "Cash-Flow" (поток наличности) . По их мнению, Cash-Flow равен сумме годового избытка, амортизационных отчислений и взносов в пенсионный фонд. Часто из Cash-Flow вычитают запланированные выплаты дивидендов, чтобы перейти от возможных объемов внутреннего финансирования к фактическим. Амортизационные отчисления и взносы в пенсионный фонд сокращают возможности внутреннего финансирования, хотя они происходят без соответствующего оттока денежных средств. В действительности эти средства находятся в распоряжении предприятия и могут быть использованы для финансирования. Следовательно, Cash-Flow может во много раз превосходить годовой избыток. Cash-Flow отражает фактические объемы внутреннего финансирования. С помощью Cash-Flow предприятие может определить свою сегодняшнюю и будущую потребность в капитале. В России категория "денежные потоки" приобретает важное значение. Об этом говорит то, что с 1995г. в состав бухгалтерской отчетности была введена дополнительная форма №4 "Отчет о движении денежных средств", которая поясняет изменения, произошедшие с денежными средствами.
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