TY - JOUR
T1 - Effect of target plate material on heat transfer characteristics in graphene-water nanofluid jet impingement
AU - Barmavatu, Praveen
AU - Deshmukh, Sonali Anant
AU - Gaddala, Baburao
AU - Doddamani, Dadapeer
AU - García-Merino, José Antonio
AU - Rosales-Vera, Marco
AU - Battisti, Felipe G.
AU - Togun, Hussein
AU - Mangalaraja, Ramalinga Viswanathan
AU - Sikarwar, Vineet Singh
N1 - Publisher Copyright:
© Akadémiai Kiadó Zrt 2025.
PY - 2025/11
Y1 - 2025/11
N2 - Graphene-water nanofluids have emerged as a promising coolant in jet impingement applications, offering remarkable enhancements in heat transfer due to their exceptional thermal conductivity and stability. This study systematically investigates the influence of target plate material properties on the convective heat transfer performance of graphene-water nanofluid jet impingements. Experiments were performed using graphene-water nanofluids with volume fractions of 0.1%, 0.15%, and 0.2% in a free multiple-jet impingement setup. Key parameters such as Reynolds number (held constant at 5000), jet impact angle (90°), and nozzle-to-plate distance (Z/D = 3) were controlled to isolate the effect of plate material. Thermal conductivity of the nanofluids was measured using the hot wire method, showing an increase from 0.6 (base fluid) to 0.75 W m−1 K−1 at 0.2% volume fraction. Viscosity measurements indicated a slight increase with nanoparticle concentration, remaining within practical limits for flow. The study revealed that plates made from aluminum showed up to a 20% higher convective heat transfer coefficient compared to stainless steel plates under identical conditions, demonstrating the significant impact of thermal conductivity and surface properties of the target plate. A novel heat transfer correlation was developed incorporating nanoparticle concentration, Reynolds number, and plate thermal conductivity, with an R2 value of 0.96, confirming strong predictive capability. The results indicate an optimal nanoparticle volume fraction of 0.2%, beyond which no significant heat transfer improvement was observed, likely due to increased viscosity effects. This research addresses the critical knowledge gap regarding plate material selection in nanofluid jet impingement systems and provides practical guidelines for enhancing cooling efficiency in industrial thermal management. Future investigations will explore hybrid nanoparticles and advanced coating techniques to maximize heat exchanger performance.
AB - Graphene-water nanofluids have emerged as a promising coolant in jet impingement applications, offering remarkable enhancements in heat transfer due to their exceptional thermal conductivity and stability. This study systematically investigates the influence of target plate material properties on the convective heat transfer performance of graphene-water nanofluid jet impingements. Experiments were performed using graphene-water nanofluids with volume fractions of 0.1%, 0.15%, and 0.2% in a free multiple-jet impingement setup. Key parameters such as Reynolds number (held constant at 5000), jet impact angle (90°), and nozzle-to-plate distance (Z/D = 3) were controlled to isolate the effect of plate material. Thermal conductivity of the nanofluids was measured using the hot wire method, showing an increase from 0.6 (base fluid) to 0.75 W m−1 K−1 at 0.2% volume fraction. Viscosity measurements indicated a slight increase with nanoparticle concentration, remaining within practical limits for flow. The study revealed that plates made from aluminum showed up to a 20% higher convective heat transfer coefficient compared to stainless steel plates under identical conditions, demonstrating the significant impact of thermal conductivity and surface properties of the target plate. A novel heat transfer correlation was developed incorporating nanoparticle concentration, Reynolds number, and plate thermal conductivity, with an R2 value of 0.96, confirming strong predictive capability. The results indicate an optimal nanoparticle volume fraction of 0.2%, beyond which no significant heat transfer improvement was observed, likely due to increased viscosity effects. This research addresses the critical knowledge gap regarding plate material selection in nanofluid jet impingement systems and provides practical guidelines for enhancing cooling efficiency in industrial thermal management. Future investigations will explore hybrid nanoparticles and advanced coating techniques to maximize heat exchanger performance.
KW - Convective heat transfer coefficient
KW - Graphene-water nanofluids and thermal conductivity
KW - Heat transfer
KW - Liquid jet impingement
KW - Nanofluid
UR - https://www.scopus.com/pages/publications/105020831764
U2 - 10.1007/s10973-025-14814-4
DO - 10.1007/s10973-025-14814-4
M3 - Article
AN - SCOPUS:105020831764
SN - 1388-6150
VL - 150
SP - 19095
EP - 19112
JO - Journal of Thermal Analysis and Calorimetry
JF - Journal of Thermal Analysis and Calorimetry
IS - 23
ER -