VALIDATION OF A CFD MODEL GP A THREE» DIMENSIONAL TUBEnlN-TUBE HEAT EXCHANGER

摘要: ABSTRACT Computational Fluid Dynamics (CFD) was developed to model many flow types and in addition, can be used to solve heat transfer problems. A tube-in-tube exchanger, with hot water {single phase) flowing in the inner tube and cold water in the annulus was investigated. The heat exchanger was numerically modelled in three~ dimensions in CH). The heat transfer coefficients and the friction factors were determined with CFD and compared to established correlations. The results showed reasonable agreement with empirical correlations, while the trends were similar. When compared with experimental data the CFD model’s results showed good agreement. The second part ot ‘the study investigated the CFD’S ability to model a prototype configuration of a tube-inmtube exchanger. This ability will greatly reduce cost and time when developing a new heat. exchanger. The numerical data was compared …