Abstract
Moisture evaporation on porous surface has grown into a dynamic research due to the advancement in building technologies, wooden frames, water purification, baking and cooling purpose. Evaporation on a porous surface involves complex multiphysics coupling heat and moisture transport concurrently. In the present work, numerical simulation of evaporation on the porous surface is carried out on the basis of heat and moisture transport theory. Simulations are carried out using COMSOL Multiphysics software. The simulation result of this model is validated against the analytical solution ensuing good agreement. Post-validation, a parametric analysis of the evaporation on porous surface is done to compute temperature variation, relative humidity variation, mass transfer coefficient and heat transfer coefficient at various regions on the porous surface. These results are useful for sensitivity analysis of various porous materials in the mathematical modelling of evaporation on the flat surfaces.
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Abbreviations
- c :
-
Concentration (mol/m3)
- t :
-
Time (s)
- T :
-
Temperature (K)
- c p :
-
Heat capacity (J/(kg K))
- k :
-
Thermal conductivity (W/(m-K))
- Q b :
-
Heat of vaporisation (J/mol)
- D :
-
Diffusion coefficient (m2/s)
- M mass :
-
Molecular weight (kg/mol)
- m :
-
Evaporation rate (kg/s)
- H vap :
-
Latent heat of vaporisation (J/kg)
- H :
-
Relative humidity (%)
- ρ :
-
Density (kg/m3)
- sat:
-
Saturated condition
- a:
-
Air domain
- l:
-
Liquid phase
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Prakash, J., Sikarwar, B.S., Agarwal, B.K., Kumar, R. (2021). Modelling and Simulation of Evaporation on Porous Surface. In: Sikarwar, B.S., Sundén, B., Wang, Q. (eds) Advances in Fluid and Thermal Engineering. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-0159-0_11
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DOI: https://doi.org/10.1007/978-981-16-0159-0_11
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