Masters Theses


Fikri Yalvac


"The Thomas method (1) for determining the thermal conductivity of solid materials can be used for the determination of the thermal conductivity of granular materials. In this thesis this method has been used to determine the effect of the granular size of sand cn its thermal conductivity.

River sand was classified according to size by the Tyler Standard Screen Scale into 50-60, 50-80, 80-100, 100-200, and below 200 mesh size. These sands were used for the experiments. The clay was separated from these samples to obtain pure river sand for the experiments.

According to the International Critical Tables, the thermal conductivity of sand, k, is between 0.1728 and 0.2212 Btu/hr-ft-°F in the range of 32 - 320°F. In the experiments performed, a temperature range of 80 - 150°F was used, and the results obtained were close to the reported values. The effective thermal conductivity increased for the first three samples of 50-60, 60-80, 80-100 mesh size of the Tyler Standard Screen Scale, but it decreased for the last samples of the very fine granular sand, 100-200 , and below 200 mesh size.

The experiments were performed under atmospheric pressure without convective currents.

The purpose of these experiments was to determine the effect of the granular size of sand on the thermal conductivity. The results obtained regarding very small grain size were of particular interest.

The results are expressed in Table 7 and Graph 8"--Abstract, pages ii-iii.


Miles, Aaron J.

Committee Member(s)

Francis, Lyman L., 1920-2004
Joiner, James W., 1931-2013
Remington, Charles R., 1924-2013


Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering


Page 43, a very large graph folded in the manuscript, is included here as a supplemental file. Due to its large size, it may take longer to download.


University of Missouri at Rolla

Publication Date



45 pages

Note about bibliography

Includes bibliographical references (page 44).


© 1964 Fikri Yalvac, All rights reserved.

Document Type

Thesis - Open Access

File Type




Thesis Number

T 1665

Print OCLC #


Yalvac_Fikri_1964-p43.tif (425290 kB)
The Original Graph of the Electronic Potentiometer for Sample 4