Numerical investigation of swirling flow and heat transfer of a nanofluid in a tube with helical ribs using a two-phase model

2021 ◽  
Author(s):  
Roohollah Hosseini Monfared ◽  
Mohammadreza Niknejadi ◽  
Davood Toghraie ◽  
Pouya Barnoon
Keyword(s):  
Heat Transfer ◽  
Numerical Investigation ◽  
Swirling Flow ◽  
Phase Model ◽  
Two Phase ◽  
Flow And Heat Transfer

Effect of thermal radiation on magnetohydrodynamics nanofluid flow and heat transfer by means of two phase model

2015 ◽  
Vol 374 ◽  
pp. 36-43 ◽  
Author(s):  
Mohsen Sheikholeslami ◽  
Davood Domiri Ganji ◽  
M. Younus Javed ◽  
R. Ellahi
Keyword(s):  
Heat Transfer ◽  
Thermal Radiation ◽  
Phase Model ◽  
Nanofluid Flow ◽  
Two Phase ◽  
Flow And Heat Transfer

Scrutiny of Unsteady Flow and Heat Transfer in a Backward-Facing Step Under Pulsating Nanofluid Blowing Using the Eulerian-Eulerian Approach

2017 ◽  
Vol 35 (1) ◽  
pp. 93-105 ◽  
Author(s):  
I. Zahmatkesh ◽  
E. Torshizi
Keyword(s):  
Heat Transfer ◽  
Flow Field ◽  
Unsteady Flow ◽  
Water Flow ◽  
Base Fluid ◽  
Phase Model ◽  
Backward Facing Step ◽  
Two Phase ◽  
Flow And Heat Transfer ◽  
Non Equilibrium

AbstractIn this paper, unsteady flow and heat transfer of water flow in a backward-facing step under pulsating nanofluid blowing are studied numerically. Attention is focused to examine the impact of this type of blowing and its pertinent parameters on the heat transfer performance and to detect possible non-equilibrium between the base fluid and the nanoparticles inside the flow field. To this aim, the Eulerian-Eulerian two-phase model is adopted. This approach consists of separate equation sets for the base fluid and the nanoparticles. So, it provides details of the flow field for each of the constituents, separately. Computations are undertaken for different cases and the consequences of the frequency, amplitude, and the mean velocity of the pulsating blowing as well as the type, diameter, and the volume fraction of the nanoparticles therein on the heat transfer characteristics are analyzed. It is found that in addition to thermal conductivity of the blown nanoparticles, their penetration into the water flow is an important trait that has a momentous role on the heat transfer rate. In the current Eulerian-Eulerian simulation, temperature distributions of the base fluid and the nanoparticles are similar but the corresponding velocity fields are quite distinct. This reveals a kind of non-equilibrium between the base fluid and the nanoparticles inside the flow that invalidates equilibrium approaches (e.g., the single-phase model or the two-phase mixture model) for the description of the problem.

Numerical Investigation of Flow and Heat Transfer around Two Semi-Circular Cylinders with a Splitter Plate

2011 ◽  
Vol 42 (7) ◽  
pp. 595-612
Author(s):  
Masome Heidary ◽  
Mousa Farhadi ◽  
Kurosh Sedighi ◽  
Mostafa Nourollahi
Keyword(s):  
Heat Transfer ◽  
Numerical Investigation ◽  
Splitter Plate ◽  
Circular Cylinders ◽  
Flow And Heat Transfer
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