The JOS model
• Cradle CFD’s thermo-fluid analysis software includes the JOS
function which is used to simulate and analyse human body skin
surface temperature and quantity of perspiration. It divides a
model of the human body into 17 segments and simulates the
morphological and physiological characteristics and
thermoregulation function of each segment by solving heat
balance equations
• It is based on the Joint System Thermoregulation Model (JOS),
developed by Professor Shin-ichi Tanabe at Waseda University,
which simulates the human body blood circulation system in great
detail and includes correction algorithms to account for
physiological differences caused by age, gender, and body size.
• By combining the thermoregulation model and CFD
(computational fluid dynamics) the effects that changes in the
surrounding environment on core temperatures and the skin
throughout the body can be analysed.
• The model is typically used to help engineers design the air
conditioning systems for buildings or vehicle interiors and climate
control systems
