Heat Transfer & Radiation

Optimizing heat transfer can be critical in many types of industrial equipment, like turbine blades, engine blocks and combustors, as well as in the design of buildings and structures. In such applications, an accurate prediction of convective heat transfer is essential. In many of these cases, the diffusion of heat in solids and/or heat transfer by radiation also plays an important role.

ANSYS CFX software features the latest technology for combining fluid dynamics solutions using conjugate heat transfer (CHT) for the calculation of thermal conduction through solid materials. The solid domain meshes for CHT regions can be created independently, and then general grid interfaces (GGI) used to attach any non-conformal meshes that are created. Additional related features include the ability to account for heat conduction through thin baffles, thermal resistance at contact areas between solids and through coatings on solid surfaces, and advection in CHT solids due to motion.

ANSYS CFX incorporates a wealth of models to capture all types of radiative heat exchange in and between fluids and solids —  from fully and semi-transparent to radiation, or opaque. The most flexible model is the Monte Carlo model that simulates the physical interactions between photons and their environment by tracing a representative number of rays through the simulation domain. It can simulate any variation from optically thick to thin (or transparent) media, both in fluids and solids. To maximize efficiency, the radiation mesh can be automatically coarsened in regions in which changes in the radiation field are small.

ANSYS CFX gives your the choice of different spectral models to account for wavelength dependencies in a simulation. It also enables scattering effects to be taken into account.

View Larger ImageDetailed analysis of fluid flow through automotive turbocharger turbine together with temperature in exhaust manifold metal using CHT technology in ANSYS CFXCourtesy BorgWarner Turbo & Emission Systems.