Fluid Mechanics and Heat Transfer

Inexpensive Demonstrations and Laboratory Exercises

William Roy Penney, Edgar C. Clausen

• Publisher: CRC Press
• Year: 2018
• Print ISBN: 9780815374367
• eBook ISBN: 9781351242318
• Topic: Physical Sciences
• Subtopic: Industrial & Technical Chemistry

This practical book provides instruction on how to conduct several "hands-on" experiments for laboratory demonstration in the teaching of heat transfer and fluid dynamics. It is an ideal resource for chemical engineering, mechanical engineering, and engineering technology professors and instructors starting a new laboratory or in need of cost-effective and easy to replicate demonstrations. The book details the equipment required to perform each experiment (much of which is made up of materials readily available is most laboratories), along with the required experimental protocol and safety precautions. Background theory is presented for each experiment, as well as sample data collected by students, and a complete analysis and treatment of the data using correlations from the literature.

Section II

Heat Transfer Experiments and Demonstrations

9

Thermal Conductivity and Radiative Experiments Measurement^*

Edgar C. Clausen, William Roy Penney, Dave C. Marrs, Megan V. Park, Anthony M. Scalia, and Nathaniel S. Weston

CONTENTS

9.1 Thermal Conductivity of Sheet and Granular Materials

9.1.1 Introduction

9.1.2 Experimental

9.1.2.1 Experimental Equipment List

9.1.2.2 Experimental Procedure

9.1.3 Data Reduction

9.1.4 Comparison of Experimental Results with Values from the Literature

9.2 Radiative Absorptivity of Metallic Surfaces

9.2.1 Introduction and Objective

9.2.2 Experimental

9.2.2.1 Experimental Equipment List

9.2.2.2 Experimental Procedure

9.2.2.3 Safety Concerns

9.2.3 Data Reduction

9.2.4 Comparison of Experimental Results with Values from the Literature

9.3 Conclusions

9.4 Nomenclature

References

9.1 Thermal Conductivity of Sheet and Granular Materials

9.1.1 Introduction

Thermal conductivity is a quantitative measure of the ability of a material to conduct heat according to Fourier’s law. Thermal conductivity varies from a low value of 0.026 $\frac{\text{W}}{\text{m}°\text{C}}$ for rigid foam urethane to 2300 $\frac{\text{W}}{\text{m}°\text{C}}$ for diamond. In this experiment, a simple, inexpensive transient method was used for determining the thermal conductivity of low conductivity solid and granular materials. The objectives of this experiment were to

1. Determine the thermal conductivities of various sheet materials.

2. Compare the experimental thermal conductivities to literature values.

No attempts were made to include contact resistance due to air gaps and surface irregularities, which were of minor importance.

9.1.2 Experimental

9.1.2.1 Experimental Equipment List

• Three mill-finish aluminum plates (3.8 × 30.5 × 45.7 cm [$\text{1}\frac{1}{2}$ × 12 × 18 in])

• Two Omega Model HH12 thermocouple readers

• Two 3.2 mm diameter × 30.5 cm long ($\frac{1}{8}$ in diameter × 12 in long) sheathed thermocouples

• One hair dryer (Hartman Protec Model 1600)

• One insulated (1.3 cm [$\frac{1}{2}$ in] Styrofoam®) heating box (58.4 × 50.8 × 33.0 cm, or 23 × 20 × 13 in)

• Two Plexiglass^® sheets (45.7 × 30.5 × 3.2 mm [18 × 12 × $\frac{1}{8}$ in])

• Two polystyrene foam sheets (45.7 × 30.5 cm × 5.7 mm [18 × 12 × 0.23 in])

• Two plywo...

Table of contents

• Cover
• Half Title
• Title Page
• Copyright Page
• Table of Contents
• Preface
• Editors
• Section I Fluid Mechanics Experiments and Demonstrations
• Section II Heat Transfer Experiments and Demonstrations
• Index