Abstract
Since the high heat has a bad effect on every electric coolant device performance in small spaces, enhance thermal systems became a challenge to achieve better performance. In the present study, investigate the forced heat transfer and laminar CuO–water nanofluid flow around the sinusoidal cylindrical and cylindrical heat sink, at Reynold number less than 700, and at a constant heat flux. Which is simulated numerically by Galerkin approach finite element methods FEM. The main purpose of the study is to drop the heat spam by enhancing the heat transfer coefficient of laminar flow in different channel types of special shape (corrugate cross-section) using nanofluid. Study the effect of hydraulic diameter of sinusoidal cylindrical to classify the channels depended on (Dh ≤ 3 mm). The new design of heat sink is employed “sinusoidal cylindrical heat sink” varied according to the amplitude values (λ) and the corrugation number (G). A digest of the findings, the best enhance at φ = 0.15%vol of 16.31% and 16.53% for G = 3 and G = 10, respectively. A great drop in wall temperature about 20.47 and 16.58 for λ = 20 of G = 3, and G = 10, respectively, as the volume fraction of CuO–water nanofluid increased at Re = 478 & q″ = 127.3 kW/m2, comparing with water. In conclusion, the sinusoidal heat sink of λ = 20 with CuO–H2O nanofluid of φ = 0.15%vol showed best enhance in heat transfer coefficient. Increased the corrugate number G led to a decrease in the friction factor and thermal resistance. Furthermore, using nanofluid led to reduce the surface wall temperature, the friction factor also the thermal resistance.
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Comsol Multiphysics.
Abbreviations
- 3D:
-
Three-dimensional.
- 2D:
-
Two-dimensional
- A s :
-
Surface area m2
- A c :
-
Cross-section area m2
- C p :
-
Specific heat at constant pressure, J/kg K
- C :
-
Circumference
- D h :
-
Hydralic diameter, m
- R mean :
-
Mean radius, m
- h av :
-
Average convection heat transfer coefficient, W/m2 K
- k :
-
Thermal conductivity, W/m K
- L ch :
-
Channels length
- ṁ:
-
Mass flow rate (kg/s)
- Nu:
-
Nusselt number=(h × Dh/k)
- P :
-
Pressure, kPa
- Q :
-
Volume flow rate (L/min)
- q″ :
-
Heat flux (W/m2)
- Re :
-
Reynolds number = (ρnfuinDh/μf)
- T :
-
Temperature, K
- u in :
-
Fluid inlet velocity, m/s
- G :
-
Corrugate number
- μ :
-
Viscosity, kg/m s
- ρ :
-
Density, kg/m3
- φ :
-
Volume fraction
- λ :
-
Amplitude
- av:
-
Average b bulk
- bf:
-
Base fluid
- nf:
-
Nanofluid
- f:
-
Fluid
- c:
-
Cross section
- ch:
-
Channel convection
- p:
-
Particle
- w:
-
Wall
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SAAA-M: develop the numerical solution, extract the results, EMA is supervising and reviewing the finding of the present study, FHA conceived of the presented idea. All authors discussed the results and contributed to the final manuscript.
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Al-Mohsen, S.A.A., Abed, I.M. & Ali, F.H. A numerical comparison of circular and corrugation heat sink for laminar CuO–water nano-fluid flow and heat transfer enhancement. Appl Nanosci 13, 2739–2766 (2023). https://doi.org/10.1007/s13204-021-02003-2
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DOI: https://doi.org/10.1007/s13204-021-02003-2