===firstname: Hyeongkae ===firstname3: ===affil6: ===lastname3: ===email: hkpark@lanl.gov ===keyword_other2: ===lastname6: ===affil5: ===lastname4: ===lastname7: ===affil7: ===postal: Los Alamos National Laboratory MS-B216, Los Alamos, NM 87545 ===ABSTRACT: Accurate modeling of thermal radiative transfer problems in the X-ray regime is an important and difficult task. One of the main challenges is the presence of absorption and re-emission, which causes a strong nonlinear interaction be- tween radiation and host media. Recently, we have developed a moment-based, scale-bridging algorithm for solving thermal radiative transfer problems. High-order, low-order (HOLO) method accelerates the solution of Boltzmann transport equation using discretely-consistent low-order, continuum system. In this talk, we discuss recent progress in the algorithmic development, including stability improvements, multiphysics extension, and preliminary parallel performance study. ===affil3: ===title: Recent Progress in High-Order, Low-Order Methods for Thermal Radiative Transfer Problems ===affil2: ===lastname2: ===firstname4: ===keyword1: Robust and scalable iterative solution of coupled multi-physics problems: electromagnetics/fluids ===workshop: no ===lastname: Park ===firstname5: ===keyword2: NOT_SPECIFIED ===otherauths: ===affil4: ===competition: no ===firstname7: ===firstname6: ===keyword_other1: ===lastname5: ===affilother: ===firstname2: