NAGARE-2D- Two dimensional computer code for thermal-hydraulic analysis

Furuhashi, Ichiro*; Nakanishi, Seiji; Aoki, Tadao

A two-dimensional thermal-hydraulic analysis code "NAGARE-2D" has been developed based on the existing codes and the results of comparative validation against experimental data. Major improvements and capabilities added to the conventional codes are as follows: (1)Introduction of pressure drop term to the momentum equation. (2)Automatic treatment of boundary conditions at walls. (3)Introduction of thermal capacity of wall and heat transfer coefficient at wall surface to the enthalpy formula, and change in the convection heat transfer equation. (4)Addition of automatically calculating function of turbulent kinematic viscosity coefficient in K- turbulent model. (5)Addition of heatf lux print out function. (6)Improvement on calculation efficiency by minimizing calculation steps. From these improvements, the application of the code can be extended to wider range of engineering problems.