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Analysis of the air flow in a cold store by means of computational fluid dynamics.

Author(s) : HOANG M. L., VERBOVEN P., BAERDEMAEKER J. de, et al.

Type of article: Article, IJR article

Summary

Airflow inside a cold store is investigated using computational fluid dynamics. The airflow model is based on the steady state incompressible, Reynolds-averaged Navier-Stokes equations. The turbulence is taken into account using a k-epsilon (turbulence kinetic energy/turbulence energy dissipation) model. The standard as well as the Renormalisation-Group (RNG) version of the k-epsilon model is investigated. The forced-circulation air cooler unit is modelled with an appropriate body force and resistance, corresponding to the characteristics of the fan and the tube-bank evaporator. The finite volume method of discretisation is used. The validation of the model has been performed by a comparison of the calculated time-averaged velocity magnitudes with the mean velocities measured by means of a hot-film type omni-directional velocity sensor. A relative error on the calculated air velocities of 26% was observed. The RNG k-epsilon model does not help to improve the prediction of the recirculation. Both a finer grid and enhanced turbulence models are needed to improve the predictions.

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Pages: 127-140

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Details

  • Original title: Analysis of the air flow in a cold store by means of computational fluid dynamics.
  • Record ID : 2000-2694
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 23 - n. 2
  • Publication date: 2000/03

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