Foreword: Special issue on the 16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics

2016 ◽  
Vol 196 (2) ◽  
pp. v-vi
Author(s):  
W. David Pointer ◽  
Xiaodong Sun
Keyword(s):  
Nuclear Reactor ◽  
Thermal Hydraulics ◽  
Special Issue

Foreword: Special issue on the 16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics

2016 ◽  
Vol 184 (3) ◽  
pp. iii-iv
Author(s):  
Michael Corradini ◽  
Nam T. Dinh ◽  
Sama Bilbao y Leon
Keyword(s):  
Nuclear Reactor ◽  
Thermal Hydraulics ◽  
Special Issue

Full Implicit Integrate Solution to the Coupled Neutronics/Thermal-Hydraulics Problems

2013 ◽  
Author(s):  
Han Zhang ◽  
Fu Li
Keyword(s):  
Nuclear Reactor ◽  
Reactor Core ◽  
Thermal Hydraulics ◽  
Field Equations ◽  
Krylov Method ◽  
Tightly Coupled ◽  
Physical Insight ◽  
Second Order Convergence ◽  
The Individual ◽  
Integrate Solution

The traditional solution of the coupled neutronics/ thermal-hydraulics problems has typically been performed by solving the individual field separately and then transferring information between each other. In this paper, full implicit integrate solution to the coupled neutronics/ thermal-hydraulic problem is investigated. There are two advantages compared with the traditional method, which are high temporal accuracy and stability. The five equations of single-phase flow, the solid heat conduction and the neutronics are employed as a simplified model of a nuclear reactor core. All these field equations are solved together in a tightly coupled, nonlinear fashion. Firstly, Newton-based method is employed to solve nonlinear systems due to its local second-order convergence rate. And then the Krylov iterative method is used to solve the linear systems which are from the Newton linearization. The two procedures above are the so-called Newton-Krylov method. Furthermore, in order to improve the performance of the Krylov method, physics-based preconditioner is employed, which is constructed by the physical insight. Finally, several Newton-Krylov solution approaches are carried out to compare the performance of the coupled neutronics / thermal-hydraulic equations.

Sign in / Sign up

Export Citation Format

Share Document