Journal of the Japanese Society of Snow and Ice
Online ISSN : 1883-6267
Print ISSN : 0373-1006
Search
Advanced search
OR
Browse
Search
Volume 61, Issue 4
Displaying 1-3 of 3 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Fluid dynamic analysis of snow drift using a non-Boussinesq k-ε turbulence model
    Yusuke FUKUSHIMA, Kazunari FUJITA, Takefumi SUZUKI, Kenji KOSUGI, Take ...
    1999Volume 61Issue 4 Pages 285-296
    Published: July 15, 1999
    Released on J-STAGE: August 07, 2009
    DOIhttps://doi.org/10.5331/seppyo.61.285
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A numerical analysis of snow drift has been carried out. The results were compared with experimental snow drift data in the low temperature wind tunnel at Shinjo. The numerical model is based on the non-Boussinesq approximation in which the density is a function of volumetric concentration of snow particles. The model consists of the air continuity eguation, the mass snow particle conservation equation, the Reynolds equation the turbulence kinetic energy equation an equation of the viscous dissipation rate. Using several sets of parameters; i.e. the slope angles, the near bed concentrations and the diameters of snow particles, the model calculations are carried out. In the experiment, snow drift was generated in a wind tunnel. The velocity profile was measured using a hot film anemometer and snow particle flux was measured by a snow particle counter (SPC). The numerical solutions can explain these profiles well if we choose appropriate values of parameters included in the model.
    View full abstract
    Download PDF (4166K)
  • New method to measure the stability of snow for mountain climbers and skiers
    Hitoshi KONO, Koji NAKAGAWA
    1999Volume 61Issue 4 Pages 297-302
    Published: July 15, 1999
    Released on J-STAGE: February 05, 2010
    DOIhttps://doi.org/10.5331/seppyo.61.297
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    An instrument made of a spring balance and clothes has been developed for measuring the shear strength of a weak layer and the weight of the snow on the weak layer. It enables mountain climbers and skiers to predict the probability of avalanche occurrence. The shear strength measured by this method was compared with that measured by the shear frame method. Both the data agreed within 10%. The stability of snow slopes was measured 51 times on four mountains in one winter season. Twelve small avalanche experiments were also conducted on three mountains. Comparison between the measured stability data and the results of avalanche experiments showed that this method is helpful for the mountain climbers and skiers and can reliably predict snow avalanche release.
    View full abstract
    Download PDF (2019K)
  • For the control of blowing snow(2)
    Visibility in blowing snow
    Masao Takeuchi
    1999Volume 61Issue 4 Pages 303-310
    Published: July 15, 1999
    Released on J-STAGE: February 05, 2010
    DOIhttps://doi.org/10.5331/seppyo.61.303
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    [in Japanese]
    View full abstract
    Download PDF (1147K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top