<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Several studies indicate that the temperature distribution in concrete may affect the extent of frost scaling. This study presents a numerical model that describes the thermal response of freezing mortars in the presence of an external liquid reservoir, where the external liquid is either pure water or 3% sodium chloride solution. The phase transformation of supercooled external liquid is modelled in two stages: quick freezing, when the supercooled liquid starts to form crystals and slow freezing. The model is developed in two parts. In part I, the focus is the modelling of external liquid, and therefore a non-porous body with an external liquid reservoir is modelled and validated. In part II, the model developed in part I is developed further for a porous body containing different phases, i.e., unfrozen liquid and ice, in the pores. A comparison of simulated and experimentally measured temperature distributions shows a good agreement.</p>
</abstract>

Several studies indicate that the temperature distribution in concrete may affect the extent of frost scaling. This study presents a numerical model that describes the thermal response of freezing mortars in the presence of an external liquid reservoir, where the external liquid is either pure water or 3% sodium chloride solution. The phase transformation of supercooled external liquid is modelled in two stages: quick freezing, when the supercooled liquid starts to form crystals and slow freezing. The model is developed in two parts. In part I, the focus is the modelling of external liquid, and therefore a non-porous body with an external liquid reservoir is modelled and validated. In part II, the model developed in part I is developed further for a porous body containing different phases, i.e., unfrozen liquid and ice, in the pores. A comparison of simulated and experimentally measured temperature distributions shows a good agreement.

Numerical Modelling of Heat Transport in Freezing Mortars with an External Liquid Reservoir

Nordic Concrete Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Several studies indicate that the temperature distribution in concrete may affect the extent of frost scaling. This study presents a numerical model that...

Numerical Modelling of Heat Transport in Freezing Mortars with an External Liquid Reservoir

Published Online: Dec 30, 2021

Page range: 149 - 169

Received: Oct 31, 2021

Accepted: Dec 27, 2021

DOI: https://doi.org/10.2478/ncr-2021-0019

Keywords
Freezing and thawing, temperature distribution, heat transport, numerical modelling

© 2021 Abdul Faheem et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Numerical Modelling of Heat Transport in Freezing Mortars with an External Liquid Reservoir

Published Online: Dec 30, 2021

Page range: 149 - 169

Received: Oct 31, 2021

Accepted: Dec 27, 2021

DOI: https://doi.org/10.2478/ncr-2021-0019

KeywordsFreezing and thawing, temperature distribution, heat transport, numerical modelling

© 2021 Abdul Faheem et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Freezing and thawing, temperature distribution, heat transport, numerical modelling