On cavity flow at high Reynolds numbers

Nallasamy, M.; Prasad, K. Krishna

doi:10.1017/s0022112077000214

Cited by 101 publications

(28 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present model data are compared with the data presented by Nalassamy and Prasad [56]. Both the velocity and temperature profiles of the present model show excellent agreement with the results predicted by Nalassamy and Prasad [56].…”

Section: Model Verificationsupporting

confidence: 81%

“…The dimensionless local velocity and temperature profiles at the cavity center (x* = x/L = 0.5) for a mixed convective flow with Re = 100 are shown along with the height of the cavity (y* = y/H). The present model data are compared with the data presented by Nalassamy and Prasad [56]. Both the velocity and temperature profiles of the present model show excellent agreement with the results predicted by Nalassamy and Prasad [56].…”

Section: Model Verificationsupporting

confidence: 81%

“…In addition, the simulations are performed for various Al2O3 nanoparticles concentrations and two other fin area fractions. Here the Prandtl number of water is 6.83, while the Prandtl numbers of Al2O3-water nanofluids are estimated as 6.59, 6.37, and 5.97 for 1%, 2%, and 4% nanoparticle concentrations, The comparison between dimensionless local velocity (u*) and temperature (T*) at the cavity center (x* = 0.5) along the height of a simplified lid-driven square cavity without the fin with those of Nalassamy and Prasad [56]. …”

Section: Resultsmentioning

confidence: 87%

See 2 more Smart Citations

Constructal Design of a Rectangular Fin in a Mixed Convective Confined Environment

et al. 2018

View full text Add to dashboard Cite

Extended surfaces or fins offer an efficient solution in many engineering situations that demand a higher heat transfer, including cooling gas-turbine components and electronic chips via internal convective flows. However, fins require a higher active surface area for higher heat transfer, which may not be always feasible in a confined environment. A feasible solution to enhance heat transfer from fins can be the use of nanofluids, which are the combination of a fluid base and nanoparticles. The main purpose of this study is, therefore, to optimize a rectangular fin intruded into the mixed convective confined space filled with a nanofluid and by means of constructal design. Here, a two-dimensional macroscopic numerical model has been developed for Al 2 O 3 -water nanofluid to investigate the heat transfer and fluid flow inside a square confined-space with an intruded rectangular fin and to optimize the fin geometry for maximizing the heat transfer using the constructal design method. The flow fields, temperature fields, heat transfer rates, and the transition from forced to mixed convection are examined for different values of Rayleigh and Reynolds numbers for various fin geometries in order to maximize the heat transfer from the fin to the surrounding nanofluid flow. The outcome of this study provides important insights into the constructal design method for the confined environment, which would be beneficial in developing novel fin geometries with enhanced and controlled heat-transfer for engineering problems, including cooling gas-turbine components and electronic chips.

show abstract

Section: Model Verificationsupporting

confidence: 81%

Section: Model Verificationsupporting

confidence: 81%

Section: Resultsmentioning

confidence: 87%

See 1 more Smart Citation

Constructal Design of a Rectangular Fin in a Mixed Convective Confined Environment

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The results for Re =1000 are plotted with those of Tosaka [32], Thomasset [30] and, Nallasamy and Prasad [34] in Figure 5. Tosaka [32] formulated the boundary integral equations with primitive variables and constructed the fundamental solution by adopting Hormander's method.…”

Section: Numerical Resultsmentioning

confidence: 99%

Boundary element analysis of driven cavity flow for low and moderate Reynolds numbers

Aydın

Fenner

2001

Numerical Methods in Fluids

View full text Add to dashboard Cite

SUMMARYA boundary element method for steady two-dimensional low-to-moderate-Reynolds number flows of incompressible fluids, using primitive variables, is presented. The velocity gradients in the Navier -Stokes equations are evaluated using the alternatives of upwind and central finite difference approximations, and derivatives of finite element shape functions. A direct iterative scheme is used to cope with the non-linear character of the integral equations. In order to achieve convergence, an underrelaxation technique is employed at relatively high Reynolds numbers. Driven cavity flow in a square domain is considered to validate the proposed method by comparison with other published data.

show abstract

“…There is an obvious analogy with the lid-driven or shear-driven cavity flows, and there are many numerical and experimental studies of shear-driven rectangular cavities from which the basic flow can be deduced. Stokes flow was assumed by Roshko (1955), Burggraf (1966), Kistler and Tan (1967), Pan and Acrivos (1967), Shen and Floryan (1985) and Gustafson and Halasi (1986), but studies at high Reynolds numbers were done by Nallasamy and Prasad (1977). Unfortunately, there is very little information on the flow within a cylindrical cavity, for either lid-or shear-driven flows.…”

Section: Static Pressure Errorsmentioning

confidence: 99%

Static pressure correction in high Reynolds number fully developed turbulent pipe flow

McKeon¹,

Smits²

2002

Meas. Sci. Technol.

View full text Add to dashboard Cite

Measurements are reported of the error in wall static pressure reading due to the finite size of the pressure tapping. The experiments were performed in incompressible turbulent pipe flow over a wide range of Reynolds numbers, and the results indicate that the correction term (as a fraction of the wall stress) continues to increase as the hole Reynolds number d + = u τ d/ν increases, contrary to previous studies. For small holes relative to the pipe diameter the results follow a single curve, but for larger holes the data diverge from this universal behaviour at a point that depends on the ratio of the hole diameter to the pipe diameter.

show abstract

On cavity flow at high Reynolds numbers

Cited by 101 publications

References 23 publications

Constructal Design of a Rectangular Fin in a Mixed Convective Confined Environment

Constructal Design of a Rectangular Fin in a Mixed Convective Confined Environment

Boundary element analysis of driven cavity flow for low and moderate Reynolds numbers

Static pressure correction in high Reynolds number fully developed turbulent pipe flow

Contact Info

Product

Resources

About