Comsolic solution of an elliptic cylindrical compressible fluid flow

AbstractIn this article, the primary focus is to investigate the heat transfer effects with viscous compressible laminar flow in the permeable elliptic cylinder. The Reynolds number is kept 100 for flow to be laminar. The physics of heat transfer is selected to be coupled with the laminar flow. The results for particular step-size time for Velocity distribution, pressure profile, temperature profile, isothermal temperature contours, and drag coefficient have been analyzed. Mesh has been generated through COMSOL, mesh entities have been elaborated statistically. The maximum and minimum velocity profile is observed at the elliptical cylinder’s walls and upper, lower boundary respectively. The maximum velocity observed is 2.22 m/s. Pressure profile around elliptic corners is found maximum, distinct patterns are observed even under the influence of applied heat. Temperature is observed maximum at walls but it gradually increases as moving from the upper boundary towards the lower boundary. The isothermal contour patterns are observed maximum near the walls, drag coefficient of gradual decrease is observed. COMSOL multi-physics is utilized for mathematical modeling of problems and the Backward-Differentiation-Formula has been exploited to handle problems numerically. The results will help greatly to understand the characterizations of viscous fluids and in industries like air furnaces and automobile cooling systems.

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Compressible Time-Dependent Steam Flow And Thermal Heat Analysis In Squared Cylinder: A Numerical Investigation

10.21203/rs.3.rs-1148480/v1 ◽

2021 ◽

Author(s):

Azad Hussain ◽

Muhammad Arsaln ◽

Ali Hassan ◽

Aysha Rehman

Keyword(s):

Heat Transfer ◽

Laminar Flow ◽

Velocity Distribution ◽

Drag Coefficient ◽

Pressure Distribution ◽

Numerical Investigation ◽

Flow Regime ◽

Lift Coefficient ◽

Time Dependent ◽

Comsol Multiphysics

Abstract This paper investigates time-dependent compressible steam laminar flow coupled with heat transfer in fluids in a squared cylinder. The present problem has been designed in COMSOL-Multiphysics. The laminar flow is selected keeping the Mac number low. The flow possesses a no-slip condition with the wall of geometry. The pressure kept on flow is 0 Pas and the temperature of the flow regime is 305.13. The flow is initiated with a velocity of 0.5m/s. The effects of time on velocity distribution and pressure distribution are described with the help of graphs. Different results like drag coefficient, lift coefficient, heat distributions are also discussed. The technique used to solve modeled problem is BDF.

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Numerical Investigation of Forced Convection From Small Rectangular Coiled Pipes

ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels, Parts A and B ◽

10.1115/icnmm2006-96219 ◽

2006 ◽

Author(s):

Ibrahima Conte ◽

Zhen Yang ◽

Xiaofeng Peng

Keyword(s):

Heat Transfer ◽

Laminar Flow ◽

Numerical Investigation ◽

Forced Convection ◽

Flow Behavior ◽

Three Dimensional ◽

Maximum Velocity ◽

Inlet Velocity ◽

Small Pitch ◽

Pitch Distance

Investigations are done to numerically analyze forced convection from rectangular coiled pipes using commercial CFD software Fluent 6.0. The problems considered were three-dimensional laminar flow with water inside and outside the pipe. Calculations are done for two rectangular coiled pipes of different values of pitch (distance between two adjacent coils centers). The shift of location of the water flow maximum velocity was significantly observed in the case of smaller pitch. It is expected that the higher pitch value reduces the effects of the torsion. The shift of the flow maximum velocity area allows the fluid to be mixed well inside the pipe. For the outside flow, the flow behavior and the heat transfer should be improved by increasing the outside inlet velocity for the case of small pitch.

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