## Treatise on materials science and technology, Volume 1 |

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Page 138

B (69) The group velocity Cg is the velocity with which the energy

travels through the composite and the angle 0g defines the direction of the

We notice that in general 6g is different than 9k, the direction of the incident wave

.

B (69) The group velocity Cg is the velocity with which the energy

**flux**actuallytravels through the composite and the angle 0g defines the direction of the

**flux**.We notice that in general 6g is different than 9k, the direction of the incident wave

.

Page 149

Angular dependence of the directions of polarization (6P) and

waves in the yz plane in a tetragonal composite for /k///r = 0.25. All the angles are

measured from the z axis. The function g(9), obtained numerically from the Eqs.

Angular dependence of the directions of polarization (6P) and

**flux**(6,) for elasticwaves in the yz plane in a tetragonal composite for /k///r = 0.25. All the angles are

measured from the z axis. The function g(9), obtained numerically from the Eqs.

Page 296

l) = 0 where R and Rl are the diffusivity ratios (D12/D23) and (Dl2/Dl3),

respectively. The quantity X is the ratio of the

coefficient (km). It is the latter quantity which is a measure of the flow properties of

the system.

l) = 0 where R and Rl are the diffusivity ratios (D12/D23) and (Dl2/Dl3),

respectively. The quantity X is the ratio of the

**flux**(J) to the mass transportcoefficient (km). It is the latter quantity which is a measure of the flow properties of

the system.

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