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Download PIV measurements of differentially heated enclosure: Design of an experimental facility for building airflow and heat transfer measurements eBook

by Mohammad Elyyan

Download PIV measurements of differentially heated enclosure: Design of an experimental facility for building airflow and heat transfer measurements eBook
ISBN:
3838374746
Author:
Mohammad Elyyan
Category:
Science & Mathematics
Language:
English
Publisher:
LAP LAMBERT Academic Publishing (June 20, 2010)
Pages:
124 pages
EPUB book:
1476 kb
FB2 book:
1907 kb
DJVU:
1735 kb
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Rating:
4.5
Votes:
955


An experimental facility was constructed and instrumented to conduct heat transfer experiments and flow visualization. The experimental facility is a 1/5-scale model of a full-scale two story building with aspect ratio (H/L) of . 25

An experimental facility was constructed and instrumented to conduct heat transfer experiments and flow visualization. 25. Natural convection experiments were conducted with hot and cold end walls with the rest of the enclosure insulated. Air was the working medium inside the experimental facility. The Grashof number of the flow was ~ 108. Smoke flow visualization and PIV were conducted for the flow field inside the experimental facility.

PIV measurements showed the existence of reversing loops next to the top . By (author) : Mohammad Elyyan

PIV measurements showed the existence of reversing loops next to the top and bottom of the enclosure. The PIV technique worked well with natural convection flow with olive oil droplets of 1 – 3 mm used as seeding particles PIV measurements. Design of an experimental facility for building airflow and heat transfer measurements. By (author) : Mohammad Elyyan. Number of pages: 124. Published on

The experimental and numerical results of the heat transfer and airflow by turbulent mixed convection in a. .Mixed Convective Cooling of a Rectangular Cavity with Inlet and Exit Openings on Differentially Heated Side Walls.

The experimental and numerical results of the heat transfer and airflow by turbulent mixed convection in a ventilated cavity are presented. The experimental setup was built to use air as the heat transfer fluid. One vertical wall receives a uniform and constant heat flux, whereas the opposite wall is maintained at constant temperature. The remaining walls are thermally insulated.

A circular airflow was observed inside the compartment A new set of measurements is reported on natural convection heat transfer in air from isothermal long horizontal cylinders of noncircular cross.

A circular airflow was observed inside the compartment. Heat transfer rates of a single horizontal tube immersed in a water-filled enclosure tilted at 30 degrees are measured. A new set of measurements is reported on natural convection heat transfer in air from isothermal long horizontal cylinders of noncircular cross section at various orientations, covering the Rayleigh number (Ra) range from about 10(3) to about 10(9). The data are correlated reasonably well by a conduction layer model with a constant value (. the same for all body shapes.

For the first time, heat transfer during condensation has been studied using gradient heat flux measurement. The applicability of the new method has been tested on a model of a well-studied object-a circular pipe. The experiments involved heat transfer investigation during condensation of saturated water vapor at the outer and inner surfaces of the pipe.

Airflow and heat near a façade withdifferent heating .

Airflow and heat near a façade withdifferent heating ota Karava 1, Thanos Tzempelikos 1, Mark Bessoudo 1,Luis M. Candanedo 1, Louis Handfield 2 and Andreas Athienitis 11Department of Building, Civil & Environmental Engineering, Concordia re des Technologies de l’ Énergie (Hydro-Québec), Shawinigan. Design of perimeter zones and façades, Study the thermal comfort near windows withdifferent configurations, Provide guidelines for reduction of perimeterheating3

Natural convection in a differentially heated cavity with two horizontal adiabatic . International Journal of Heat and Mass Transfer, Vol. 72, Issue.

Natural convection in a differentially heated cavity with two horizontal adiabatic fins on the sidewalls. A PIV measurement of the natural transition of a natural convection boundary layer. Experiments in Fluids, Vol. 56, Issue.

The heat transfer rate was found to increase with the water mist rate and .

The heat transfer rate was found to increase with the water mist rate and decrease with the surface temperature. Heat transfer rate was enhanced over that for the single-phase air flow as a result of water mist evaporation and direct heat conduction by the water film generated on the heated surfaces. The experimental facility mainly consists of an adiabatic vertically-set channel with a circular cross-section of 50 mm outer diameter, 3 mm-thick walls and 940 mm total length. Air was pumped by using 1000 W air blower with AC voltage regulator to adjust airflow velocity.

In many cases, the data of experimental measurements or advanced . With the measurements of temperature and CO2 concentration in five mechanically and four naturally ventilated office buildings, Hummelgaard et al.

In many cases, the data of experimental measurements or advanced computer simulations are also used in the development of the empirical models to obtain some coefficients that make empirical models work in a certain scope. In theory, the analytical and empirical models do not differ very much. In the same facility but for cross ventilation in a building, Nishizawa et al. found that main flow, rebounding and changing flow direction, deflected flow, surface flow, and circulating flow were very important for cross ventilation.

Heat Transfer Problem: Show transcribed image text. Transcribed Image Text from this Question. Experimental measurements of the convection heat transfer coefficient for a square bar in cross flow yielded the following values. The two experimental values were both found for air with a constant Prandlt number. h 1 50W/m^2 middot K when V 1 20m/s h 2 40W/m^2 middot K when V 2 15 m/s Assume that the functional form of the Nusselt number is Nu CRe^m Pr^n where C, m, and n are. all constants.

An experimental facility was constructed and instrumented to conduct heat transfer experiments and flow visualization. The experimental facility is a 1/5-scale model of a full-scale two story building with aspect ratio (H/L) of 0.625. Natural convection experiments were conducted with hot and cold end walls with the rest of the enclosure insulated. Air was the working medium inside the experimental facility. The Grashof number of the flow was ~ 108. Smoke flow visualization and PIV were conducted for the flow field inside the experimental facility. Heat transfer results obtained agreed fine with the results reported in the literature. Smoke visualization and PIV techniques showed the existence of thin boundary layer next to the isothermal walls and stationary core inside the enclosure. The flow was two dimensional as proved by the temperature measurement, smoke visualization, and PIV results. PIV measurements showed the existence of reversing loops next to the top and bottom of the enclosure. The PIV technique worked well with natural convection flow with olive oil droplets of 1 ? 3 mm used as seeding particles PIV measurements.