Conjugate heat transfer study comprising the effect of thermal conductivity and irreversibility in a pipe filled with metallic foams

Jadhav, Prakash H.; Gnanasekaran, N.; Perumal, D. Arumuga

doi:10.1007/s00231-020-03000-x

Cited by 12 publications

(5 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Where:𝑓 = (1.58 ln 𝑅𝑒 3.82) −2 The Blasius equation is given by: 𝑓 = 0.3164 𝑅𝑒 −0.25 For 4 × 10 3 < 𝑅𝑒 < 1 × 10 5 (25) Additionally, in Figure 8 the experimental result for the average Nusselt number from the current study is validated using the numerical result from Jadhav et al [32] for pore density 40PPI copper metallic foam. As can be seen from the figure, the discrepancy between the numerical and experimental results decreases as the mass flow rate increases since the air is used as the working fluid in the numerical research.…”

Section: Verification Of the Resultsmentioning

confidence: 66%

“…The results show the thermal conductivity increased and enhancement for 8 PPI of metal foam due to increase the internal structure and turbulent flow developed easier. Numerical investigation presented by Jadhav et al [32] was to study the effect of thermal performance and entropy generation by using Ansys fluent. The copper, aluminum and nickel metal foam filled partially in a tube.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermal performance analysis of heat transfer in pipe by using metal foam

2023

jjmie

View full text Add to dashboard Cite

In this work, turbulent forced convection heat transfer in a circular horizontal pipe with insert of metal foam under the condition of constant heat flux is experimentally investigated. The Nusselt number (Nu) and friction factor (f) were tested under heat flux (31.8 and 42.4 )KW/m 2 and water flow rates (3, 6 and 9) lit/min. Circular copper pipe with dimensions of 0.6 m in length, 0.025 m in diameter, and 0.001 m in thickness acts as the test section for the current investigation. It is heated by an electric heater mounted outside the pipe. The foam has pores per inch ranging from (10 to 40) PPI and porosity between ( 0.89 and 0.93).The water flowing through the pipe has a regular input temperature of 32°C.The temperature was measured along the pipe distributed in seven sections of the wall, in addition to measuring the temperature of entering and exiting the water from the pipe. The results show that, with a heat flux of 42.4 KW/m 2 , the copper metal foam of 40 PPI gives a higher increase in average Nusselt number up to 73% as compared to metal foam of 10 PPI of 63.74%. The difference in pressure drop between pipes with and without metal foam varies just slightly at 10 PPI, but becomes greater at 40 PPI.

show abstract

Section: Verification Of the Resultsmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Thermal performance analysis of heat transfer in pipe by using metal foam

2023

jjmie

View full text Add to dashboard Cite

show abstract

“…where d f is the fiber diameter in m, and d P is the pore diameter in m. The properties of metal foam, for example fiber diameter, permeability, pore size and inertial coefficient are determined by Table 5. The detailed information on porous media metal foam is described in [11,22,34]. Table 6 gives the copper metal foam properties considered for present study.…”

Section: Governing Equations and Turbulence Modellingmentioning

confidence: 99%

“…A diagonal arrangement gives higher heat transfer compared to a parallel one. Jadhav [34] et al studied the performance of the copper, aluminum, and nickel metal foams in a horizontal pipe. The performance factor increased with an increase in PPI.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Study for Enhancement of Heat Transfer Using Discrete Metal Foam with Varying Thickness and Porosity in Solar Air Heater by LTNE Method

2022

View full text Add to dashboard Cite

A two-dimensional rectangular domain is considered with a discrete arrangement at equal distances from copper metal foam in a solar air heater (SAH). The local thermal non-equilibrium model is used for the analysis of heat transfer in a single-pass rectangular channel of SAH for different mass flow rates ranging from 0.03 to 0.05 kg/s at 850 W/m2 heat flux. Three different pores per inch (PPI) and porosities of copper metal foam with three different discrete thicknesses at equal distances are studied numerically. This paper evaluates the performance of SAH with 10 PPI 0.8769 porosity, 20 PPI 0.8567 porosity, and 30 PPI 0.92 porosity at 22 mm, 44 mm, and 88 mm thicknesses. The Nusselt number for 22 mm, 44 mm, and 88 mm thicknesses is 157.64%, 183.31%, and 218.60%, respectively, higher than the empty channel. The performance factor for 22 mm thick metal foam is 5.02% and 16.61% higher than for 44 mm and 88 mm thick metal foam, respectively. Hence, it is found that metal foam can be an excellent option for heat transfer enhancement in SAH, if it is designed properly.

show abstract