ANALYTICAL AND NUMERICAL-STUDIES OF ANGULAR-CORRELATION FUNCTION OF WAVES SCATTERED FROM RANDOMLY DISTRIBUTED CYLINDERS

The analytical solution for the angular correlation function of scatte red waves from randomly distributed infinitely long cylinders is obtai ned using the second-order approximation with a modified attenuation c oefficient. The approach is based on the coherent summation of the sca ttered waves which preserves the interference effects such as backscat tering enhancement. The modification of the transport attenuation coef ficient includes the contribution due to the incoherent wave. By compa ring with the exact numerical simulations, we found that the correctio n factor is given by (1 - <(mu)over bar>) which also appears in the di ffusion equation. The present approach gives good agreement with numer ical and experimental results.