All issues
Volume 19, Issue 1
Displaying 1-8 of 8 articles from this issue
- |<
- <
- 1
- >
- >|
-
[in Japanese]2000 Volume 19 Issue 1 Pages 1-2
Published: January 31, 2000
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSDownload PDF (1849K) -
Focused on Application of CFD[in Japanese]2000 Volume 19 Issue 1 Pages 4-10
Published: January 31, 2000
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSDownload PDF (5105K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...2000 Volume 19 Issue 1 Pages 11-26
Published: January 31, 2000
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSDownload PDF (3152K) -
Akihiro KITAMURA, Eiji HASEGAWA, Masatsugu YOSHIZAWA2000 Volume 19 Issue 1 Pages 27-36
Published: January 31, 2000
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSIn this paper the issue is addressed of how a liquid film of non-uniform thickness thins to a planar profile during spin coating. Asymptotic method is applied to a case in which the initial film thickness is even in radial coordinate and the peripheral effects of liquid film are assumed to be negligible. The analytical expressions for the transient film profile near the rotating axis are obtained. The analysis reveals the effects of gravitational and surface tension forces as well as the effect of inertial force on film formation in the initial and the late stage of process.View full abstractDownload PDF (1416K) -
BingHu PIAO, Shigeaki KURODA2000 Volume 19 Issue 1 Pages 37-46
Published: January 31, 2000
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSIn this paper, Cartesian grid method for incompressible viscous fluid flows is investigated. New grid structure based on the Cartesian grids and cut cells, which fitted to the boundaries of body are generated. The Finite Volume Method (FVM) is used for calculations of the Navier-Stokes equations and the continuity equation. Cavity flows and flows around a stationary circular cylinder in a uniform flow are calculated by the present method and compared with the results that obtained by previous method. It is also shown that the new grid system can be applied to the complex geometry problems.View full abstractDownload PDF (1653K) -
Katsuhiro SAKAI, Takeshi TERASAWA2000 Volume 19 Issue 1 Pages 47-50
Published: January 31, 2000
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSA Locally Exact Numerical Scheme LENS is improved, in which the spatial distribution of the coefficients of transport equations is taking into consideration based on a four-region model. A reference general solution is derived by imposing continuous conditions on the boundary between adjacent two regions. The convection term is discretized by an interpolation formula which satisfies identically the reference general solution. Numerical experiments for 1D and 2D problems with analytical solutions have been performed.View full abstractDownload PDF (570K) -
You-Taek KIM, Kazuhiro TANAKA, Yoichiro MATSUMOTO2000 Volume 19 Issue 1 Pages 51-54
Published: January 31, 2000
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSA screw-type centrifugal pump was manufactured to carry solids primarily and its impeller has a wide flow passage. However, the effect of flow passage shape on delay of the choke due to entrained air has not been enhanced yet. For that reason, we carried out the pump performance experiment under air-water two-phase flow condition with different impeller tip clearances and void fractions. At a narrow tip clearance, we obtained the result that the pump head became partially higher in two-phase flow than that in single-phase flow near the best efficiency point in low void fraction region. And the loss became much larger in low flow rate region at both tip clearances. Moreover, we have observed the internal flow patterns by using a stroboscope and a halogen sheet light. Then, we have investigated the influences of flow patterns on two phenomena above-mentioned and mechanism of choking its flow passage.View full abstractDownload PDF (5977K) -
Shuya YOSHIOKA, Shinnosuke OBI, Shigeaki MASUDA2000 Volume 19 Issue 1 Pages 55-58
Published: January 31, 2000
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSThe vortex structure in the periodically perturbed turbulent separated shear layer is experimentally investigated. The backward-facing step flow is chosen for the test case, where the perturbation has been introduced as a direct suction and injection at the step edge. In this study, the particle imaging velocimeter (PIV) has been applied to measure the flow field. The data processing has been performed by means of the phase-averaging, synchronized with the perturbation, so that the periodic motion associated with the perturbation is extracted. It is discovered that the large-scale vortices are introduced by the perturbation and these vortices are convected downstream successively. It is also revealed that these vortices have a major role on the increasing of Reynolds stress in the separated shear layer enabling in the enhancement of the momentum transfer that promotes reattachment.View full abstractDownload PDF (693K)
- |<
- <
- 1
- >
- >|