کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
264237 | 504095 | 2011 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Heat transfer and mass flow correlations for ventilated facades Heat transfer and mass flow correlations for ventilated facades](/preview/png/264237.png)
Natural convection heat transfer and mass flow phenomena in ventilated facades are numerically investigated in this work. The study focuses on the determination of accurate results in terms of correlations for the average Nusselt number at each of the two walls of the ventilated facade and for the mass flow induced in the cavity, as functions of the descriptive geometrical and thermal parameters, covering the laminar region with modified Rayleigh numbers Rab* ranging from 100 to 105. Comparison with available experimental data and numerical results is first presented to validate the validity of the numerical procedure. Then correlations are proposed for the heat and the mass flow in symmetrically and asymmetrically heated channels. These correlations are developed as a contribution for the thermal models of ventilated facades, in which the accurate determination of heat transfer coefficients and induced mass flow rates are of great importance to establish the energetic performances of the element.
► Natural convection heat transfer and mass flow phenomena in ventilated facades are numerically investigated.
► New specific correlations to obtain the Nusselt number for each wall separately of ventilated façades.
► New specific correlations to obtain the induced mass flow in the channel.
Journal: Energy and Buildings - Volume 43, Issue 12, December 2011, Pages 3696–3703