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Using the temperature distribution of solid structures obtained by a CFD (computational fluid dynamics) analysis, thermal-stress analyses can be conducted. In the paper, an FVM (finite volume method) based CFD software is used to solve for the temperature and flow field. Making complex mesh model, it uses a hybrid mesh consists of tetrahedron, hexahedron, prism and pyramid elements. And all variables are defined on nodes of elements. Because the hybrid mesh and variables on nodes are compatible between structural analysis FEM (finite element method) elements and node based CFD FVM elements, not only the temperature distribution of the solid but also the mesh can be directly applied to the thermal-stress analysis. The following three approaches are investigated for the best possible solution of FVM/FEM coupled problems. 1) The mesh and the temperature distribution of CFD are applied in a thermal-stress analysis directly, taking full advantage of the mesh compatibility.