Abstract
A two-dimensional dmodel was constructed to predict the temperature and water content at a given time within a garden subsoil heated by warm air released through a perforated pipe. The simple theory used, employed the concept of moisture diffusion (D) and mass transfer coefficients in forced and natural convection (αrm, αr1m) analagous to heat diffusion (a) and heat transfer coefficients (α, αr1). An experiment was conducted in a soil channel to verify the theory and measurements were made of subsoil temperatures and water contents with time. The correlation between measured and calculated values was found to be reasonable (R>0·92)with mean square errors between the measured and calculated temperatures and water contents of 0·85°C and 0·02 kg/kg respectively.
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