Large-eddy simulation of combined forced and natural convection in a vertical plane channel

Wang, Bing-Chen; Bergstrom, Donald J.

doi:10.1016/j.ijheatmasstransfer.2007.02.014

Cited by 14 publications

(8 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This current research is a continuation of our previous work [40], which focused on addressing the basic features of the temperature and velocity fields of the test flow obtained using the LES approach described in Section 3 in comparison with the DNS data of Kasagi and Nishimura [38], Kuroda et al [51] and Davidson et al [39]. Therefore, in order to keep our present analysis focused on the geometrical properties of the thermal flow field, we skip the discussion of the details of the basic flow features and refer the interested reader to our previous study [40].…”

Section: Analysis Of Resultssupporting

confidence: 64%

“…Therefore, in order to keep our present analysis focused on the geometrical properties of the thermal flow field, we skip the discussion of the details of the basic flow features and refer the interested reader to our previous study [40].…”

Section: Analysis Of Resultsmentioning

confidence: 99%

“…As such, due to the buoyancy effect, it is expected that the value of Re a τ obtained from the simulation slightly deviates from the nominal value of 150. For a detailed discussion of the Reynolds number, the reader is referred to Yin et al [40].…”

Section: Numerical Methods and Sgs Modelsmentioning

confidence: 99%

“…The temperature is non-dimensionalized using the temperature difference between the two walls (Yin et al[40])Fig. 3 Mean resolved velocity and temperature profiles across the channel displayed using wall coordinates.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Geometrical Properties of the Resolved-Scale Velocity and Temperature Fields Predicted using Large-Eddy Simulation

Wang

Bergstrom

2008

Flow Turbulence Combust

Self Cite

View full text Add to dashboard Cite

In this paper, local geometrical properties of the velocity and temperature fields of combined forced and natural convection in a vertical slot are studied using large-eddy simulation based on both numerical and analytical approaches. Previous studies on turbulence geometrical statistics appearing in the literature have primarily focused on either isothermal or isotropic turbulent flows; whereas in this work, we extend the scope of research to investigation of a wall-bounded thermal flow. In particular, we focus on studying the resolved helicity, enstrophy generation, local vortex stretching, and a variety of characteristic geometrical alignment patterns between the resolved velocity, vorticity, temperature gradient, subgrid-scale heat flux and the eigenvectors of the resolved strain rate tensor. In order to quantify the effect of buoyancy on the geometrical properties of the thermal flow field, a systematic comparative analysis has been conducted based on three different flow regimes (i.e., viscous sublayer, buffer layer and logarithmic layer) in both the hot and cold wall regions. The near-wall restriction on the geometrical property of the thermal flow field has been analyzed and some interesting wall-limiting geometrical alignment patterns in the form of Dirac delta functions are also reported.

show abstract

Section: Analysis Of Resultssupporting

confidence: 64%

Section: Analysis Of Resultsmentioning

confidence: 99%

Section: Numerical Methods and Sgs Modelsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Geometrical Properties of the Resolved-Scale Velocity and Temperature Fields Predicted using Large-Eddy Simulation

Wang

Bergstrom

2008

Flow Turbulence Combust

Self Cite

View full text Add to dashboard Cite

show abstract

“…Useful simulations and numerical analysis of the forced convection [13][14][15][16] are already in existence but none can be effectively applied to the reflow soldering environment. Only a limited number of publications deal with convection reflow ovens, and unfortunately these contain mistakes.…”

Section: Introductionmentioning

confidence: 99%

Investigating direction characteristics of the heat transfer coefficient in forced convection reflow oven

Illés

Harsányi

2009

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

Heating characteristics of convection reflow ovens

Illés¹,

Harsányi²

2009

Applied Thermal Engineering

View full text Add to dashboard Cite

Abstract:The inhomogeneous temperature distribution in the reflow oven can cause soldering failures. In this project, we investigate how the construction of a convection reflow oven has an affect on its heating characteristics. In the convection reflow oven itself, the heating capability is mainly dependent on the heat transfer coefficient, which in turn is mostly determined by the gas flow parameters. Therefore, we study how the construction of the reflow oven affects the flow of gas in the oven. Our conclusions are then verified with experimental results. During our experiments, temperature changes were measured at different points located around the centre of the processing area in the oven. From this data, the 3D directional characteristics of the heat transfer coefficient was calculated using the heat equation of the investigated reflow oven. We consider that our results are important for the effective thermal modelling of the reflow soldering process [1] and are also useful when calibrating and designing reflow ovens. During our work, we examine the latest reflow ovens constructed with the nozzle-matrix blower system.

show abstract

Large-eddy simulation of combined forced and natural convection in a vertical plane channel

Cited by 14 publications

References 52 publications

Geometrical Properties of the Resolved-Scale Velocity and Temperature Fields Predicted using Large-Eddy Simulation

Geometrical Properties of the Resolved-Scale Velocity and Temperature Fields Predicted using Large-Eddy Simulation

Investigating direction characteristics of the heat transfer coefficient in forced convection reflow oven

Heating characteristics of convection reflow ovens

Contact Info

Product

Resources

About