# A low-re RSTM model for computations of heat transfer and fluid flow for impingement and convective cooling

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding

### Standard

**A low-re RSTM model for computations of heat transfer and fluid flow for impingement and convective cooling.** / Jia, Rongguang; Sundén, Bengt.

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding

### Harvard

*Proceedings of the ASME Turbo Expo 2004.*vol. 3, American Society Of Mechanical Engineers (ASME), pp. 429-438, 2004 ASME Turbo Expo, Vienna, Austria, 2004/06/14.

### APA

*Proceedings of the ASME Turbo Expo 2004*(Vol. 3, pp. 429-438). American Society Of Mechanical Engineers (ASME).

### CBE

### MLA

*Proceedings of the ASME Turbo Expo 2004.*American Society Of Mechanical Engineers (ASME). 2004, 429-438.

### Vancouver

### Author

### RIS

TY - GEN

T1 - A low-re RSTM model for computations of heat transfer and fluid flow for impingement and convective cooling

AU - Jia, Rongguang

AU - Sundén, Bengt

PY - 2004

Y1 - 2004

N2 - A new Reynolds stress transport model (RSTM) aimed for engineering applications is proposed with consideration of near-wall turbulence. This model employs the SSG pressure strain term, the ω equation, and the SST model for the shear stresses at the near-wall region (say y+ less than or equal 30). The models are selected based on the following merits: The SSG RSTM model performs well in the fully turbulent region and does not need the wall normal vectors; the ω equation can be integrated down to the wall without damping functions; The SST model is a proper two-equation model that performs well for flows with adverse pressure gradient, while most two-equation models can have a good prediction of the shear stresses. A function is selected for the blending of the RSTM and SST. Three cases are presented to show the performance of the present model: (1) fully developed channel flow with Reτ = 395, (2) backward-facing step with an expansion ratio of 1.2 and Re = 5,200 base on the step height, (3) circular impingement with the nozzle-to-wall distance H = 4D and Re = 20,000.

AB - A new Reynolds stress transport model (RSTM) aimed for engineering applications is proposed with consideration of near-wall turbulence. This model employs the SSG pressure strain term, the ω equation, and the SST model for the shear stresses at the near-wall region (say y+ less than or equal 30). The models are selected based on the following merits: The SSG RSTM model performs well in the fully turbulent region and does not need the wall normal vectors; the ω equation can be integrated down to the wall without damping functions; The SST model is a proper two-equation model that performs well for flows with adverse pressure gradient, while most two-equation models can have a good prediction of the shear stresses. A function is selected for the blending of the RSTM and SST. Three cases are presented to show the performance of the present model: (1) fully developed channel flow with Reτ = 395, (2) backward-facing step with an expansion ratio of 1.2 and Re = 5,200 base on the step height, (3) circular impingement with the nozzle-to-wall distance H = 4D and Re = 20,000.

KW - Stagnation region

KW - Reynold stress

KW - Impingment

KW - Convective cooling

KW - Cooling ducts

M3 - Paper in conference proceeding

VL - 3

SP - 429

EP - 438

BT - Proceedings of the ASME Turbo Expo 2004

PB - American Society Of Mechanical Engineers (ASME)

ER -