Regional airflow characteristics in mechanically ventilated rooms

Dissertant

Abd al-Jabbar, Ahmad M.

University

University of Technology

Faculty

-

Department

Department of Electromechanical Engineering

University Country

Iraq

Degree

Master

Degree Date

2004

English Abstract

A numerical study of two-dimensional turbulent buoyant recirculating flow within mechanically ventilated rooms is reported.

The study involves the solution of elliptic partial differential equations for the conservation of mass, momentum, energy, turbulent energy and its dissipation rate in a finite difference form.

These equations were solved together with algebraic expressions for the turbulent viscosity and heat diffusivity, by using the (K-e) turbulence model.

A modified version of a two-dimensional elliptic computer code was used to simulate the complex flows inside the room.

A ventilated room with buoyant flow and heated floor was used as a test case to examine the performance of the present computer program and to verify it.

The computed flow parameters were compared with measurements of the previous researchers.

These comparisons show good agreement.

Thereafter, the simulation of slot ventilated room with the presence of a heated obstruction was made.

Three sizes of the heated obstructions were studied h / H (0.11, 0.13 and 0.4).

The predicated flow and isotherm patterns were plotted and discussed.

The present study demonstrates that the flow behavior depends on several parameters, such as airflow rate equal to ACH (5, 10, 16 and 21), size and temperature of the heated obstruction (17 °C, 25 °C and 35 °C).

Each of these parameters was modeled separately to understand how each parameter affects the airflow characteristic inside the slot ventilated room.

Main Subjects

Mechanical Engineering

Topics

• Mathematical models
• Fluid dynamics
• Air flow

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-305697