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International Journal of Advanced Technology and Engineering Exploration (IJATEE)

ISSN (Print):2394-5443    ISSN (Online):2394-7454
Volume-7 Issue-64 March-2020
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Paper Title : A study of transient effect of constant indirect flow velocity through multiple upper-vents in un-stratified rectangular ventilated building using theoretical approach
Author Name : Muhammad Auwal Lawan, Sunusi Aminu Nata Ala, Muhammad Yusuf Muhammad, Aliyu Lawan Musa, Rabi’u Bashir Yunusa and Bashir Danladi Garba
Abstract :

The paper is an extension of authors own work in which, studied of transient effect of stack-driven airflow in cross- ventilated building with three opening in the presence of opposing flow in one of the upper-vent. An analysis has been carried out to study the transient effect of constant indirect flow velocity in rectangular building with multiple upper- vents induced by stack-driven effect. Moreover, equations of momentum and energy are non dimensionalised using some dimensionless quantities and solved theoretically by means of separation of variable method. The asymptotic behavior of parameters involved in the study predicts the result for Velocity, temperature distributions together with volumetric and mass- transfer. The results of the study are presented graphically and discussed for varying values of physical parameters involved such as, effective thermal coefficient( θ_0 ), Prandtl number( Pr) and Grashof number( Gr). In addition, comparison with previously published work by was performed. In which, the study concluded that, the results for present work is more effective and efficient than the previous work in term of ventilation process. Finally, from the course of investigation, it was observed air temperature and velocity increase with the increase in both parameters( θ_0 ), ( Pr) and ( Gr) respectively.

Keywords : Transient effect, Indirect flow velocity, Multiple upper vents, Ventilated building
Cite this article : Lawan MA, Nata Ala SA, Muhammad MY, Musa AL, Yunusa RB, Garba BD. A study of transient effect of constant indirect flow velocity through multiple upper-vents in un-stratified rectangular ventilated building using theoretical approach. International Journal of Advanced Technology and Engineering Exploration. 2020; 7(64):53-72. DOI:10.19101/IJATEE.2020.762016 .
References :
[1]Allocca C, Chen Q, Glicksman LR. Design analysis of single-sided natural ventilation. Energy and Buildings. 2003; 35(8):785-95.
[Crossref] [Google Scholar]
[2]Awbi HB, Nemri MM. Scale effect in room airflow studies. Energy and Buildings. 1990; 14(3):207-10.
[Crossref] [Google Scholar]
[3]Awbi HB. Air movement in naturally-ventilated buildings. Renewable Energy. 1996; 8(1-4):241-7.
[Crossref] [Google Scholar]
[4]Chow CL. Air flow rate across vertical opening induced by room heat sources. International Journal on Architectural Science. 2010; 8(1):11-6.
[Google Scholar]
[5]Muhammad AL, Baffa AB, Ringim MZ. Investigations of stack-driven airflow through rectangular cross-ventilated building with two openings using analytic technique. International Journal of Computer Applications. 2016; 141(6):5-11.
[Google Scholar]
[6]Muhammad AL, Gano DA, Ringim MZ, Ibrahim SA, Baffa AB. Theoretical study on steady airflow through multiple upper opennings inside a rectangular building in the presence of indirect flow. Communications on Applied Electronics. 2018; 7(14):17-25.
[Google Scholar]
[7]Duan S, Lia Y. An example of solution multiplicity in a building with bi-directional flow openings. Indoor and Built Environment. 2005; 14(5):359-69.
[Crossref] [Google Scholar]
[8]Fan Y. CFD modelling of the air and contaminant distribution in rooms. Energy and Buildings. 1995; 23(1):33-9.
[Crossref] [Google Scholar]
[9]Gan G. Evaluation of room air distribution systems using computational fluid dynamics. Energy and Buildings. 1995; 23(2):83-93.
[Crossref] [Google Scholar]
[10]Gan G. Simulation of buoyancy-driven natural ventilation of buildings—impact of computational domain. Energy and Buildings. 2010; 42(8):1290-300.
[Crossref] [Google Scholar]
[11]Murakami S, Kato S. Numerical and experimental study on room airflow—3-D predictions using the k-ϵ turbulence model. Building and Environment. 1989; 24(1):85-97.
[Crossref] [Google Scholar]
[12]Liddament MW. A review of building air flow simulation. Oscar Faber; 1991.
[Google Scholar]
[13]Gladstone C, Woods A, Philips J, Caulfield C. Experimental study of mixing in a closed room by doorway exchange flow. InProc 1998:555-61.
[Google Scholar]
[14]Linden PF, Lane-Serff GF, Smeed DA. Emptying filling boxes: the fluid mechanics of natural ventilation. Journal of Fluid Mechanics. 1990; 212:309-35.
[Google Scholar]
[15]Muhammad AL, Baffa AB, Dauda UM. Transient airflow process across three vertical vents induced by stack-driven effect inside un-stratified cross-ventilated rectangular building with an opposing flow in one of the upper opening. International Journal of Computer Applications. 2016;148:4-11.
[Google Scholar]
[16]Riahi DN. Mathematical modeling of wind forces. Department of Theoretical and Applied Mechanics (UIUC); 2005.
[Google Scholar]
[17]Spindler HC, Norford LK. Naturally ventilated and mixed-mode buildings—part I: thermal modeling. Building and Environment. 2009; 44(4):736-49.
[Crossref] [Google Scholar]
[18]Hunt GR, Linden PF. Steady-state flows in an enclosure ventilated by buoyancy forces assisted by wind. Journal of Fluid Mechanics. 2001; 426:355-86.
[Crossref] [Google Scholar]
[19]Luo Z, Zhao J, Gao J, He L. Estimating natural-ventilation potential considering both thermal comfort and IAQ issues. Building and Environment. 2007; 42(6):2289-98.
[Crossref] [Google Scholar]
[20]Fuliotto R, Cambuli F, Mandas N, Bacchin N, Manara G, Chen Q. Experimental and numerical analysis of heat transfer and airflow on an interactive building facade. Energy and Buildings. 2010; 42(1):23-8.
[Crossref] [Google Scholar]
[21]Santamouris M, Argiriou A, Asimakopoulos D, Klitsikas N, Dounis A. Heat and mass transfer through large openings by natural convection. Energy and Buildings. 1995; 23(1):1-8.
[Crossref] [Google Scholar]
[22]Van Hooff T, Blocken B. CFD evaluation of natural ventilation of indoor environments by the concentration decay method: CO2 gas dispersion from a semi-enclosed stadium. Building and Environment. 2013; 61:1-17.
[Crossref] [Google Scholar]
[23]Yin W, Zhang G, Yang W, Wang X. Natural ventilation potential model considering solution multiplicity, window opening percentage, air velocity and humidity in China. Building and Environment. 2010; 45(2):338-44.
[Crossref] [Google Scholar]
[24]Wilson DJ, Kiel DE. Gravity driven counterflow through an open door in a sealed room. Building and Environment. 1990; 25(4):379-88.
[Crossref] [Google Scholar]
[25]Wang X, Huang C, Cao W. Mathematical modeling and experimental study on vertical temperature distribution of hybrid ventilation in an atrium building. Energy and Buildings. 2009; 41(9):907-14.
[Crossref] [Google Scholar]
[26]Jiang Y, Chen Q. Buoyancy-driven single-sided natural ventilation in buildings with large openings. International Journal of Heat and Mass Transfer. 2003; 46(6):973-88.
[Crossref] [Google Scholar]
[27]Zöllner A, Winter ER, Viskanta R. Experimental studies of combined heat transfer in turbulent mixed convection fluid flows in double-skin-facades. International Journal of Heat and Mass Transfer. 2002; 45(22):4401-8.
[Crossref] [Google Scholar]
[28]Li Y, Delsante A, Symons J. Prediction of natural ventilation in buildings with large openings. Building and Environment. 2000; 35(3):191-206.
[Crossref] [Google Scholar]
[29]Li Y, Delsante A. Natural ventilation induced by combined wind and thermal forces. Building and Environment. 2001; 36(1):59-71.
[Crossref] [Google Scholar]
[30]Britter RE, Hunt JC, Mumford JC. The distortion of turbulence by a circular cylinder. Journal of Fluid Mechanics. 1979; 92(2):269-301.
[Crossref] [Google Scholar]
[31]Lo LC. Predicting wind driven cross ventilation in buildings with small openings (Doctoral dissertation).2012. The University of Texas at Austin.
[Google Scholar]
[32]Acred A, Hunt GR. A simplified mathematical approach for modelling stack ventilation in multi-compartment buildings. Building and Environment. 2014; 71:121-30.
[Crossref] [Google Scholar]
[33]Balocco C, Colombari M. Thermal behaviour of interactive mechanically ventilated double glazed façade: Non-dimensional analysis. Energy and Buildings. 2006; 38(1):1-7.
[Crossref] [Google Scholar]
[34]Cooper P, Linden PF. Natural ventilation of an enclosure containing two buoyancy sources. Journal of Fluid Mechanics. 1996; 311:153-76.
[Crossref] [Google Scholar]
[35]Brown WG, Solvason KR. Natural convection through rectangular openings in partitions—1: vertical partitions. International Journal of Heat and Mass Transfer. 1962; 5(9):859-68.
[Crossref] [Google Scholar]
[36]Brown WG, Solvason KR. Natural convection heat transfer through rectangular openings in partitions-II. International Journal of Heat and Mass Transfer. 1962; 5:869-78.
[Google Scholar]
[37]Linden PF. The fluid mechanics of natural ventilation. Annual Review of Fluid Mechanics. 1999; 31:201-38.
[Google Scholar]
[38]Yang T. CFD and field testing of a naturally ventilated full-scale building. Doctoral dissertation, University of Nottingham. 2004.
[Google Scholar]
[39]Muhammad AL, Ringim MZ, Isma’il LA. Transient investigation of stack-driven airflow process through rectangular cross-ventilated building with two vents in the absence of opposing flow in the upper opening. International Journal of Engineering & Technology. 2018; 7(3):1249-56.
[Crossref] [Google Scholar]
[40]Raji B, Tenpierik MJ, Bokel R, Van den Dobbelsteen A. Natural summer ventilation strategies for energy-saving in high-rise buildings: a case study in the Netherlands. International Journal of Ventilation. 2020; 19(1):25-48.
[Crossref] [Google Scholar]
[41]Lastovets N, Kosonen R, Mustakallio P, Jokisalo J, Li A. Modelling of room air temperature profile with displacement ventilation. International Journal of Ventilation. 2020; 19(2):112-26.
[Crossref] [Google Scholar]
[42]Koufi L, Younsi Z, Naji H. Computational of the wind velocity effect on infiltration rates in an individual building using multi-zone airflow model. International Journal of Ventilation. 2019; 18(1):46-63.
[Crossref] [Google Scholar]
[43]Elghamry R, Hassan H. Impact of window parameters on the building envelope on the thermal comfort, energy consumption and cost and environment. International Journal of Ventilation. 2020; 19(4):233-59.
[Crossref] [Google Scholar]