Conceptual Reference Database for Building Envelope Research Prev
Next

Evaluation of some assumptions used in multizone airflow network models

Wanga, L. and Chen, Q.
2008
Building and Environment, 43(10): 1671-1677
Air distribution; Multizone airflow model; Well-mixing assumption; Dimensional analysis; Contaminant transport

Wanga, L. and Chen, Q., (2008), "Evaluation of some assumptions used in multizone airflow network models", Building and Environment, 43(10): 1671-1677.
Abstract:
Multizone airflow network models assume that in a zone air temperature and contaminant concentrations are uniform, and air momentum effects are neglected. These assumptions could cause errors for airflow with strong buoyancy, large contaminant concentration gradient, or strong momentum. This study has found the correlations of the errors and some dimensionless air parameters. The assumption of uniform air temperature is acceptable when the dimensionless temperature gradient is smaller than 0.03. The assumption of uniform contaminant concentration is valid if the corresponding Archimedes number for the source zone is greater than 400. The assumption of neglecting air momentum effect is reasonable when the jet momentum effect is dissipated before reaching an opening in downstream.

This link has not been checked.Online source

This publication in whole or part might be found online. Check the sources on the related article below. Or use search engines on the web.
Related Concepts

Author Information and Other Publications Notes
Wanga, L.
     
Chen, Q.
School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907-2088, USA http://widget.ecn.purdue.edu/~yanchen/
  1. A Mass transfer model for simulating volatile organic compound emissions from 'wet' coating materials applied to absorptive substrates
  2. A zero-equation turbulence model for indoor airflow simulation
  3. Evaluation of various turbulence models in predicting airflow and turbulence in enclosed environments by CFD: Part 1 -- summary o
  4. Framework for coupling room air models to heat balance model load and energy calculations (RP-1222)
  5. How to verify, validate, and report indoors environmental modeling CFD
  6. Impact factor for a journal and impact of an author: are they the same?
  7. Impact of determination of convective heat transfer on the coupled energy and CFD simulation for buildings
  8. Indoor air quality factors in designing a healthy building
  9. Modelling contaminant exposure in a single-family house
  10. On approaches to couple energy simulation and computational fluid dynamics programs
  11. Performance of coupled building energy and CFD simulations
  12. Prediction of room air motion by Reynolds-stress models
  13. Sensitivity analysis and application guides for integrated building energy and CFD simulation
  14. Ventilation performance prediction for buildings: A method overview and recent applications  


CRDBER, at CBS, BCEE, ENCS, Concordia,