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Online since: March 2010
Authors: Guan Nan Liu, Feng Gao, Ming Ji, Xing Guang Liu
According to the interaction model between grains and eddies,the interaction time intt should be
less than the lifetime e of the eddy ,and the distance intL should be shorter than the space scale eL of
it.
0.75
int 1.225 /
et C k
,
0.75 1.5
int /eL L C k
(6)
During the lifetime of an eddy,the fluctuation velocity keeps fixed:
2
''
ii
uu (7)
Where is a random number from -1 to 1,which follows the standard normal distribution.
2 The turbulent model of the main phase
The airflow in working face is steady and non-equilibrium,which satisfies the continuity
equation,the momentum equation,the energy equation and the composition equation.The state
parameters of airflow could be expressed as a general variable: ' ,where represents the
time-average value,and ' represents the pulsation value.In order to close the
[3] Zhou Xi-hua,WANG Ji-ren,LU Guo-bin,et al.Journal of China Coal Society,(2002),p.59
[3] Zhou Xi-hua,WANG Ji-ren,LU Guo-bin,et al.Journal of China Coal Society,(2002),p.59
Online since: July 2011
Authors: Qing Dun Zeng, Mao Hua Ouyang
(1)
where EL is the longitudinal elastic modulus of unidirectional composite.
Table 1 Basic data of cross-ply laminates Material type EL (GPa) ET (GPa) GL (GPa) GT (GPa) Gm (GPa) t (mm) Glass/epoxy 50.0 15.20 4.70 3.28 1.26 0.2 Graphite/epoxy 130.0 9.70 5.00 3.60 1.26 0.2 Assume the total number of sub-layers N = 2m+2k =32.
Oham, et al.: Reinf.
Table 1 Basic data of cross-ply laminates Material type EL (GPa) ET (GPa) GL (GPa) GT (GPa) Gm (GPa) t (mm) Glass/epoxy 50.0 15.20 4.70 3.28 1.26 0.2 Graphite/epoxy 130.0 9.70 5.00 3.60 1.26 0.2 Assume the total number of sub-layers N = 2m+2k =32.
Oham, et al.: Reinf.
Online since: July 2011
Authors: Manuel Sánchez-Carrilero, Jose Antonio Sánchez, Miguel Álvarez, Mariano Marcos Bárcena, Álvaro Gómez-Parra, Jorge Salguero Gómez, Moises Batista
Marcos, Metodología para el Desarrollo de Prácticas Virtuales de Ingeniería de los Procesos de Fabricación, Actas XV CUIEET, Valladolid (2007)
[10] M.
Marcos, Aplicación de las Técnicas de Enseñanza Asistida por Ordenador al Desarrollo de Prácticas Virtuales de Ingeniería del Mecanizado.
Caso de Estudio: “El Centro de Torneado”, Actas XVI CUIEET, Cádiz (2008) [11] M.
Marcos, Aplicación de las Técnicas de Enseñanza Asistida por Ordenador al Desarrollo de Prácticas Virtuales de Ingeniería del Mecanizado.
Caso de Estudio: “El Centro de Torneado”, Actas XVI CUIEET, Cádiz (2008) [11] M.
Online since: May 2006
Authors: Jorge R. Frade, Alexey V. Levchenko, Ana Lucia Horovistiz, João Carlos de Castro Abrantes, Anna V. Shlyakhtina, Lidia G. Shcherbakova
Microstructure contributions from bulk, grain boundaries and
from the electrode process are marked for 550°C spectrum, respectively by, B, gb and el.
Solid lines represents the fitting with the evaluated parameters. 0 5000 10000 15000 20000 0 10000 20000 30000 40000 Z' / Ohm -Z'' / Ohm 450°C 500°C 550°C B gb el Figure 3 - Bulk (closed symbols) and grain boundary (open symbols) results obtained for samples sintered at 1600ºC (triangles), and 1670ºC or 1690ºC (diamonds).
Eberman et al: Solid State Ionics 111 (2000) p. 133
Solid lines represents the fitting with the evaluated parameters. 0 5000 10000 15000 20000 0 10000 20000 30000 40000 Z' / Ohm -Z'' / Ohm 450°C 500°C 550°C B gb el Figure 3 - Bulk (closed symbols) and grain boundary (open symbols) results obtained for samples sintered at 1600ºC (triangles), and 1670ºC or 1690ºC (diamonds).
Eberman et al: Solid State Ionics 111 (2000) p. 133
Online since: June 2014
Authors: Dan Gao, Chao Yang Fang, Li Ling Miao, Yan Jiang Pan, Jian Xu
The study divided geomorphic units by auto-extraction method which was proposed by Fei Xiao et al [8].
Zhufeng, Eling, Bijiashan, Maoping and Longshi take second place.
The node accessibility of Mount Jinggang highway network Area Number of nodes Accessibility of the average value (min) Area Number of nodes Accessibility of the average value (min) Ciping 10 15.6 Zhufeng 3 21.6 Tongmuling 2 16.8 Bijiashan 1 23.4 Urban region 3 17.1 Maoping 3 24.6 Huangyangjie 5 17.6 Longshi 3 27.4 Longtan 3 17.9 Xiangzhou 2 33.1 Eling 1 21.5 Xiankou 2 40.4 Spatial Distribution of Accessibility.
Zhufeng, Eling, Bijiashan, Maoping and Longshi take second place.
The node accessibility of Mount Jinggang highway network Area Number of nodes Accessibility of the average value (min) Area Number of nodes Accessibility of the average value (min) Ciping 10 15.6 Zhufeng 3 21.6 Tongmuling 2 16.8 Bijiashan 1 23.4 Urban region 3 17.1 Maoping 3 24.6 Huangyangjie 5 17.6 Longshi 3 27.4 Longtan 3 17.9 Xiangzhou 2 33.1 Eling 1 21.5 Xiankou 2 40.4 Spatial Distribution of Accessibility.