The computer simulation of frost penetration beneath highways

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Abstract
A computer simulation model which uses weather data as the time-variable surface boundary condition and employs a finite-difference solution to the heat conduction equation gives predictions of frost penetration beneath highways with a maximum error of 15%. The pattern and timing of freezing and thawing are also well reproduced. Further, the model is shown to be capable of reliable and consistent results using limited input data, already quite widely available. The simulated use of styrofoam insulation is shown to reduce maximum frost penetration by 45%, a value in good agreement with observation.

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