Student Manual

In the present experiment, the students will heat a metallic rod in a temperature-regulated furnace or on a hot plate and place it inside a cavity approximating a black body cavity. The temperature on the surface of the heated object as well as inside the cavity will be monitored with time. The rate of cooling will be determined and the impact of forced convection currents will also be investigated. The students will learn how to interface temperature sensors with the computer. In the course of the measurements, the students will also verify Newton’s law of cooling as a special case.

Software Code LabVIEW Code
Sample Results Forced and natural convection
Forced and natural convection, linearized plots
Experiment Code 1.3
Version 17 January 2015, 2015-v1

Further Readings and References


Pictorial Procedure

1. Provided apparatus

1. Provided apparatus

2. Cavity with cooling fan cable

2. Cavity with cooling fan cable

3. Measuring the mass of a cylinder

3. Measuring the mass of a cylinder

4. Measuring the diameter of a cylinder

4. Measuring the diameter of a cylinder

5. Cylinder inside the steel box

5. Cylinder inside the steel box

6. Attaching thermocouple to the cylinder

6. Attaching thermocouple to the cylinder

Heat_7h

8. Always use gloves and tong to remove the heated cylinder from steel box

8. Always use gloves and tong to remove the heated cylinder from steel box

9. Placing a heated cylinder inside the cavity

9. Placing a heated cylinder inside the cavity

10. Attaching E2 thermocouple to the clamp

10. Attaching E2 thermocouple to the clamp

11. Attaching a labeled E1 thermocouple inside the cavity and E2 with the cylinder

11. Attaching a labeled E1 thermocouple inside the cavity and E2 with the cylinder

12. Preparing Labview file for forced convection

12. Preparing Labview file for forced convection

13. Experimenatl setup for demonstarating forced concvection alongwith thermocouple calibration

13. Experimenatl setup for demonstarating forced concvection alongwith thermocouple calibration

14. Closing the base of the cavity

14. Closing the base of the cavity

15. Labview file for radiative and convective losses

15. Labview file for radiative and convective losses

16. Setup for simultaneous radiative and convective losses

16. Setup for simultaneous radiative and convective losses