http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
오늘 본 자료
-
Encapsulation of cellulose nanocrystals into acrylic latex particles via miniemulsion polymerization
-
Development of Eyelid Strain Sensing Setup for Eye Movement Measurement
-
윌리엄 포크너 작품에 나타난 폭력의 양상: 희생양 메커니즘
-
HCoV-IMDB: Database for the Analysis of Interactions between HCoV and Host Immune Proteins
-
아리스토텔레스 본질론의 생물학적 측면
- 검색키워드
- 저자 : MAMORU ISHII (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
-
DEVELOPMENT OF INTERFACIAL AREA TRANSPORTEQUATION
MAMORU ISHII,SEUNGJIN KIM,JOSEPH KELLY 한국원자력학회 2005 Nuclear Engineering and Technology Vol.37 No.6
The interfacial area transport equation dynamically models the changes in interfacial structures along the flow field by mechanistically modeling the creation and destruction of dispersed phase. Hence, when employed in the numerical thermalhydraulic system analysis codes, it eliminates artificial bifurcations stemming from the use of the static flow regime transition criteria. Accounting for the substantial differences in the transport mechanism for various sizes of bubbles, the transport equation is formulated for two characteristic groups of bubbles. The group 1 equation describes the transport of small-dispersed bubbles, whereas the group 2 equation describes the transport of large cap, slug or churn-turbulent bubbles. To evaluate the feasibility and reliability of interfacial area transport equation available at present, it is benchmarked by an extensive database established in various two-phase flow configurations spanning from bubbly to churn-turbulent flow regimes. The geometrical effect in interfacial area transport is examined by the data acquired in vertical air-water two-phase flow through round pipes of various sizes and a confined flow duct, and by those acquired in vertical co-current downward air-water two-phase flow through round pipes of two different sizes
-
DEVELOPMENT OF INTERFACIAL AREA TRANSPORT EQUATION
ISHII MAMORU,KIM SEUNGJIN,KELLY JOSEPH Korean Nuclear Society 2005 Nuclear Engineering and Technology Vol.37 No.6
The interfacial area transport equation dynamically models the changes in interfacial structures along the flow field by mechanistically modeling the creation and destruction of dispersed phase. Hence, when employed in the numerical thermal-hydraulic system analysis codes, it eliminates artificial bifurcations stemming from the use of the static flow regime transition criteria. Accounting for the substantial differences in the transport mechanism for various sizes of bubbles, the transport equation is formulated for two characteristic groups of bubbles. The group 1 equation describes the transport of small-dispersed bubbles, whereas the group 2 equation describes the transport of large cap, slug or chum-turbulent bubbles. To evaluate the feasibility and reliability of interfacial area transport equation available at present, it is benchmarked by an extensive database established in various two-phase flow configurations spanning from bubbly to chum-turbulent flow regimes. The geometrical effect in interfacial area transport is examined by the data acquired in vertical fir-water two-phase flow through round pipes of various sizes and a confined flow duct, and by those acquired In vertical co-current downward air-water two-phase flow through round pipes of two different sizes.
-
Lee, Sang Yong,Hibiki, Takashi,Ishii, Mamoru Elsevier 2009 Nuclear engineering and design Vol.239 No.1
<P><B>Abstract</B></P><P>Time–volume averaged two-fluid model considering structural materials in a control volume (porous media approach) is formulated for two-phase flow analyses. The time–volume averaged two-fluid model is obtained rigorously by averaging local time-averaged two-fluid model over a control volume including structural materials. The volume porosity based model obtained by the simple time–volume averaging is converted into the surface porosity based model by introducing the directional surface porosity concept. The covariance approach is adopted to consider distributions of various variables in the control volume. The obtained porous media formulation is consistent with existing two-fluid model. Existing constitutive equations may be applicable to the porous media formulation provided they are properly time–volume averaged in the control volume. The strategy to obtain time–volume averaged constitutive equations is briefly discussed.</P>
-
The Variation of Ionospheric Slab Thickness at Thailand Equatorial Latitude Station
Pusit Suvannasang,Noraset Wichaipanich,Nipa Leelaruji,Mamoru Ishii,Pornchai Supnithi 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
This paper presents the study and analysis of ionospheric slab thickness (τ) during the solar minimum in year 2006. The ionospheric slab thickness is obtained from the ratio of the total electron content (TEC) to the peak electron density in the F2 region (NmF2). According to the analysis of the total electron content and the peak electron density in the F2 region, the peak electron density in the F2 region by critical frequency (foF2) are determined by ionosonde technique. In addition, the total electron content are determined by the correlation of different time delay of 2 L - band signals from GPS satellites. All three parameters, critical frequency, total electron content, and peak electron density in the F2 region, are analyzed at the Chumphon campus King Mongkut’s Institute of Technology Ladkrabang station, located at longitude 99.3˚E and latitude 10.7 ˚N. The analyzed results show that there are irregularities of all parameters during the equinox period and the ionospheric slab thickness at low latitude peaks in the pre-sunrise.
-
Characteristics of Bubble Departure Frequency in a Low-Pressure Subcooled Boiling Flow
EUH, Dongjin,OZAR, Basar,HIBIKI, Takashi,ISHII, Mamoru,SONG, Chul-Hwa Atomic Energy Society of Japan 2010 Journal of nuclear science and technology Vol.47 No.7
<P>In order to measure the bubble departure frequency, a flow visualization system was set up on a vertical annulus test section with a heater rod by using a high-speed camera. In this study, we developed an efficient methodology of image processing for obtaining the bubble departure frequency data. Bubble nucleation was investigated under various thermal hydraulic conditions of water, which correspond to pressures from 167 to 346 kPa, mass fluxes from 214 to 1869 kg/m<SUP>2</SUP>s, heat fluxes from 61 to 238 kW/m<SUP>2</SUP>, and subcooling degrees from 7.5 to 23.4 K. The characteristics of bubble departure frequency were analyzed with the present data. The measured data was compared with models available in existing literature and a more plausible model was proposed.</P>
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
