Numerical predictions of air distribution in air conditioned space

Other Title(s)

دراسة عددية للتنبؤ بتوزيع الهواء المكيف داخل حيز

Dissertant

Hamiid, Ammar Muslim Hadi

Thesis advisor

Mahdi, Ala A.

Comitee Members

Majid, Majid Husayn
Abd al-Muhsin, Ali A.
Hammadi, Salman Hisham

University

University of Basrah

Faculty

Engineering College

Department

Department of Mechanical Engineering

University Country

Iraq

Degree

Master

Degree Date

2011

English Abstract

This numerical study covers three-dimensional, turbulent recirculating for air distribution within enclosures.

The study involves the solution of the partial differential equations for the conservation of mass, momentum, energy, turbulent energy and its dissipation rate, by using finite-volume method.

A modified version of a three-dimensional computer program (fluent 6.3.26) was used to simulate the complex flow inside the room.

Turbulent flow in a rectangular cavity is used as a test case to justify performance for the present computational program and verify it.

The results of numerical model were compared with measurements and predications of previous researchers.

These comparisons show a good agreement.

Therefore, the simulation, of non-isothermal turbulent flow within the room, firstly, and isotherm turbulent flow in large space, secondly, was made using three principle geometrical arrangement of the room and same geometry for large space with different locations of supply opening, which built by gambit(2.2.30) program.

The predicted flow and isotherm patterns were plotted and discussed for buoyant and isotherm flow.

The study demonstrates that the flow behavior depends on several parameters, such as location of the opening supply (up and down) with change the location of the obstruction time and the place of the opening outlet another time and, then, with the presence of a window.

Each of these parameters was modeled separately to understand how each of this parameters affects the flow pattern.

The “Numerical Predictions of Air Distribution in Air Conditioned spaced” effected by these parameters greatly, and, found that the location of the opening supply is related directly to load centered.

Also, the present work results show that the Coanda effect has large effect on the general form of air distribution, and then, on thermal comfort.

Another conclusion, in large space, the opening supply must be at same height with the opening outlet, that to separate the control zone (low) from terminal zone (up).

Main Subjects

Mechanical Engineering

Topics

• Mathematical models
• Aerodynamics
• Air flow

No. of Pages

91

Table of Contents

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-317180