A hybrid algorithm for the joint calculation of multiscale hydraulic problems with consideration of thermal processes

A hybrid algorithm to solve the problems of flux-distribution in a model consisting of both spatial elements and 0-dimensional (network) elements is proposed. In these problems, the flux-distribution is simulated by the methods of Hydraulic Circuit Theory (HCT). The algorithm is based on a SIMPLE-like procedure of flows (velocities) and pressure field communications in the computational domain. The hybrid model is based on a single system of pressure correction equations for the network and for the spatial domains. The flows in the corresponding subdomains are determined similar to those in the HCT or in computational hydrodynamics. In the thermal part of the problem, the relation between the spatial domains and the network domains is performed by the transfer of the enthalpy flow in the downward flow direction. The numerical results obtained according to the hybrid model are compared with experimental data and with results of spatial calculations.