Simultaneous investigation of flow and thermal fields inside a square duct with a built-in heated circular cylinder

Article Thermodynamics

Simultaneous mapping of buoyancy-induced flow and temperature fields using thermographic PIV

Vimal Kishor et al.

Summary: This study presents one of the first experimental investigations on thermographic PIV (or LIP/PIV) for simultaneous mapping of whole field temperature and velocity data in the context of natural convection. The results obtained from LIP/PIV are validated by comparing them with numerically simulated and interferometry-based whole field data. The significance of this study lies in its successful capture of the flow physics associated with buoyancy-driven convective phenomena using a single imaging technique instead of separate optical diagnostics.

EXPERIMENTAL HEAT TRANSFER (2023)

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Article Thermodynamics

Heat transfer enhancement in the novel wavy shaped heat exchanger channel with cylindrical vortex generators

Zuzana Brodnianska et al.

Summary: This study experimentally and numerically investigated the enhancement of heat transfer and the decrease of pressure drop in a wavy shaped heated channel with cylindrical vortex generators. The holographic interferometry method was used to visualize the temperature distribution, and the Ansys Fluent software was used for the evaluation of temperature, velocity, and pressure fields. The results showed that inserting the cylindrical vortex generators at position 2 of the wavy channel led to the highest thermal performance factor of 0.8167.

APPLIED THERMAL ENGINEERING (2023)

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Article Thermodynamics

Numerical investigation of impingement heat transfer on the crossflow channel with vortex generators

Yue Yang et al.

Summary: This study compares the heat transfer performance of different VGs configurations through numerical simulations, finding that the downstream common-flow-down configuration of VGs can achieve favorable heat transfer enhancement. By increasing the height of VGs and decreasing the spacing between VGs and the jet, the heat transfer efficiency can be further improved.

APPLIED THERMAL ENGINEERING (2022)

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Article Thermodynamics

Simultaneous laser-induced fluorescence, particle image velocimetry and infrared thermography for the investigation of the flow and heat transfer characteristics of nucleating vapour bubbles

V. Voulgaropoulos et al.

Summary: This study presents an advanced methodology and experimental investigation to elucidate the physical mechanisms involved in boiling. The investigation reveals important aspects of heat transfer and quantifies their contributions.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2022)

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Article Engineering, Multidisciplinary

Perforated concave rectangular winglet pair vortex generators enhance the heat transfer of air flowing through heated tubes inside a channel

Oktarina Heriyani et al.

Summary: This study increased heat transfer in a heat exchanger system by adding PCRWP VGs to reduce pressure increase. The results showed a lower CBR in the in-line configuration, but accompanied by a significant increase in thermal performance.

RESULTS IN ENGINEERING (2022)

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Article Thermodynamics