Buoyancy-driven heat transfer enhancement in a two-dimensional enclosure utilizing nanofluids

Heat transfer augmentation in a two-sided lid-driven differentially heated square cavity utilizing nanofluids

https://www.eis.hu.edu.jo/deanshipfiles/pub10311353.pdf

Numerical study of natural convection in partially heated rectangular enclosures filled with nanofluids

This review pertains to the body of work dealing with internal recirculating flows generated by the motion of one or more of the containing walls. These flows are not only technologically important, they are of great scientific interest because they display almost all fluid mechanical phenomena in the simplest of geometrical settings. Thus corner eddies, longitudinal vortices, nonuniqueness, transition, and turbulence all occur naturally and can be studied in the same closed geometry. This facilitates the comparison of results from experiment, analysis, and computation over the whole range of Reynolds numbers. Considerable progress has been made in recent years in the understanding of three-dimensional flows and in the study of turbulence. The use of direct numerical simulation appears very promising.

/pdf/fluid-mechanics-in-the-driven-cavity-25evptx577.pdf

Fluid mechanics in the driven cavity

Geometry: shape, size, aspect ratio and orientation Flow Type: forced, natural, laminar, turbulent, internal, external Boundary: isothermal (Tw = constant) or isoflux (q̇w = constant) Fluid Type: viscous oil, water, gases or liquid metals Properties: all properties determined at film temperature Tf = (Tw + T∞)/2 Note: ρ and ν ∝ 1/Patm ⇒ see Q12-40 density: ρ ((kg/m) specific heat: Cp (J/kg ·K) dynamic viscosity: μ, (N · s/m) kinematic viscosity: ν ≡ μ/ρ (m/s) thermal conductivity: k, (W/m ·K) thermal diffusivity: α, ≡ k/(ρ · Cp) (m/s) Prandtl number: Pr, ≡ ν/α (−−) volumetric compressibility: β, (1/K)

Convection Heat Transfer

Transient natural convection in a parallelogram-shaped enclosure

http://flow.kaist.ac.kr/upload/paper/1994/1994_10_IJOHAMT_37_15_2203-2210.pdf

Experimental study on mass transfer from a circular cylinder in pulsating flow

Performance evaluation of a polymer electrolyte membrane fuel cell system for powering portable freezer

Flow and heat transfer over a rotating disk with surface roughness

The thermoelectric power generation with various thermal conditions is examined. An analysis model considered the manufacturing factors and the pellet size is presented to predict the performance characteristics of thermoelectric generators. The theoretical analysis shows that the maximum power output is produced when the electrical internal resistance is identical to the external load resistance. The overall performance is significantly increased with the temperature difference between cold and hot sides of thermoelectric generator. Under the fixed temperature difference, the thermoelectric generator produces the identical voltage, current and power outputs regardless of the operating temperature since the assumption of the constant thermoelectric properties is adopted in the analysis model. However, the experimental results obtained disclose that the effect of the operating temperature appears in the overall performance of the thermoelectric generator. Thus, the experimental correction of electrical internal resistance is adopted in the modified analysis model. Considerations are focused on the explicit role of the temperature-dependent electrical internal resistance for a method of accurate performance prediction. The modified analysis model is shown to be consistent with the experimental results in terms of the voltage output, current output and power outputs.

Jae Min Hyun

Papers

Transient natural convection in a parallelogram-shaped enclosure

Experimental study on mass transfer from a circular cylinder in pulsating flow

Performance evaluation of a polymer electrolyte membrane fuel cell system for powering portable freezer

Flow and heat transfer over a rotating disk with surface roughness

Performance measurement and analysis of a thermoelectric power generator