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Evaporative resistance measurements on a new solution of foot orthosis

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Author

  • Kalev Kuklane
  • Kurt Cutbill
  • Johan Wieslander

Editor

  • Shin-ichi Tanabe

Summary, in English

The traditional orthosis are tight and allow minimal evaporation. A new prototype was designed. The thermal foot model tests were carried out at isothermal (Ts=Ta=34 °C) and non-isothermal (Ta=23 °C) conditions with relative humidity set to 17 and 41 %, respectively, and at air velocities of 0.25 (LVa) and 0.85 m/s (HVa). Evaporative resistance (Ret) was calculated based on foot model’s heat loss and mass loss. The total insulation of the new orthosis increased compared to the old one by 28 % and total resultant insulation by 17 % (LVa). Ret based on model heat loss (isothermal condition) decreased 30 (LVa) and 42 % (HVa), while the one by mass loss reduced 3.2 (HVa) and 6.6 (LVa) times. The method can be used to evaluate insulation and evaporative resistance of footwear. The purpose of the tests should define the choice of the specific method.

Publishing year

2012

Language

English

Publication/Series

Proceedings of 9th International Meeting for manikins and Modeling (9I3M)

Document type

Conference paper

Publisher

Waseda University

Topic

  • Production Engineering, Human Work Science and Ergonomics

Keywords

  • Thermal foot model
  • insulation
  • air velocity
  • mass loss
  • heat loss

Conference name

9th International Meeting for Manikins and Modeling

Conference date

2012-08-21 - 2012-08-24

Conference place

Tokyo, Japan

Status

Published

Research group

  • Thermal Environment Laboratory