Ray effect mitigation in jet fire radiation modelling

The radiation fields of jet fires are highly anisotropic, exhibiting a sign ificant ray effect, making their calculation potentially a computationally intensive process. Two quadrature strategies for evaluating the incident ra diative flux distribution are presented and analysed, both strategies are s hown to be highly efficient. As well as mitigating the ray effect by improv ements in computational efficiency, false convergence is avoided as numeric al error estimates and bounds are derived and demonstrated to be sharp. (C) 2000 BG Technology. Published by Elsevier Science Ltd. All rights reserved .