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Simulation of Convection in Water Phantom Induced by Periodic Radiation Heating
Published in 2009
Water calorimetry is employed to establish a primary reference standard for radiation dosimetry by measuring the temperature rises in a water phantom (a cube of about 30 cm x 30 cm x 30 cm) subjected to a beam of ionizing radiation. We use COMSOL Multiphysics to model the system using the Heat Transfer module and the Incompressible Navier-Stokes module with a geometry of 2D-axial symmetry. We have developed a technique using a modulated periodic incident radiation to establish a steady state, and measure the system response in the frequency domain.
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