Finite Element Simulation of Newtonian and Non-Newtonian Fluid through the Parallel Plates Affixed with Single Screen

Memon, Ahsan Ali; Memon, M. Asif; Bhatti, Kaleemullah; Shaikh, Gul Muhammad

doi:10.29020/nybg.ejpam.v13i1.3586

Cited by 8 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analogy is that a replacement of the Prandtl number can be made with the Schmidt number when dealing with the mass transfer problems. Also, it is explained in the literature that your results will obtain an accuracy of 80% when you compare your results with the correlations 43 – 45 . Surely, we can also presage from our simulation that accuracy can be improved when the chemical reactions are performing at the lower velocities so that the diffusion of the mixture remains under control and better accuracy will be achieved.…”

Section: Methodsmentioning

confidence: 99%

Thermal decomposition of propylene oxide with different activation energy and Reynolds number in a multicomponent tubular reactor containing a cooling jacket

Memon

Bhatti

et al. 2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

In this article, we are focusing on heat and mass transfer through a Multicomponent tubular reactor containing a cooling jacket by thermal decomposition of propylene oxide in water. The chemical reaction is an irreversible, 1st order reaction and an exothermic reaction that yields propylene glycol with enthalpy = −84,666 J/mol. The constant rate of the reaction is followed by the Arrhenius equation in which the activation energy is taken on a trial basis in the range from 75,000 to 80,000 J/mol with a fixed frequency factor. For the fluid to flow, the Reynolds number is kept in the range from 100 to 1000. The three partial differential equations of mass, momentum, and energy are coupled to study heat and mass transfer in a tubular reactor by using the chemistry interface in COMSOL Multiphysics 5.4. The initial concentration of propylene oxide is tested in the range from 2 to 3% and the thermal conductivity of the mixture is tested in the range 0.599–0.799. It was found that the amount deactivated of the compound decreases with an increase in Reynolds number. Propylene oxide is decomposed at about 99.8% at Re = 100 at lower activation energy and gives the total maximum enthalpy change in the tubular reactor. Observing the relationship between Sherwood numbers to Nusselt numbers, it was deducted that the convective heat transfer is opposite to convective mass transfer for high Reynolds numbers.

show abstract

Section: Methodsmentioning

confidence: 99%

Thermal decomposition of propylene oxide with different activation energy and Reynolds number in a multicomponent tubular reactor containing a cooling jacket

Memon

Bhatti

et al. 2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…A finite element method employing the least square technique of Galerkin's procedure is employed for power-law fluids within the non-Newtonian model, spanning the range from 0.8 to 1.2. Numerous research contributions related to this methodology have been published in reputable journals and conferences [30][31][32][33][34][35], with verification against the asymptotic solution illustrated in [36].…”

Section: Introductionmentioning

confidence: 99%

On the Analysis of Power Law Fluid over a Diamond Shaped Cylindrical Surface with Screen Boundary Conditions at High Reynolds Number

Memon,

Shaikh

et al. 2024

DDF

View full text Add to dashboard Cite

This study analyses physical aspects of power-law fluid flow over a diamond shaped cylinder under the impact of a movable screen fixed in the middle of a channel keeping an aspect ratio as 0.5 with height of the channel. The perforated plate is a screen at the middle especially settled at orientation of π/6, π/4 or π/3 degrees. The Reynolds number (Re) has been kept in the range of 1000-10,000 with power-law index in the range 0.8-1.2. For the corresponding two-dimensional problem, the governing momentum equations coupled with energy equation have been solved numerically using non-isothermal laminar fluid flow interface in the software COMSOL Multiphysics 5.4. The dimensionless velocity magnitude and the non-dimensional temperature on the diamond shaped cylinder along the vertical non-dimensional length are expressed via fixing any two parameters from (Re), angle of screen θ and power-law index. The heat transfer coefficient, effective thermal conductivity and the Nusselt number are also expressed besides the dimonsionless length of the surface of the chosen cylinder. In conclusion, we will be going to suggest points to increase the dynamics and thermal variables with the use of selected parameters Re, θ, and power law index n.

show abstract

“…Several linear regression lines [24] for optimum pressure and velocity in the rectangular domain and the drag force due to screen for in terms of the Reynolds number were expressed using the FEM approach with Galerkin's scheme. With the implementation of the screen boundary condition, another benchmark problem [25] for Newtonian and the non-Newtonian fluid using the power-law model of Oswald-de Waele was observed in the rectangular channel. Several empirical equations relating to optimum velocity as well as pressure with the Reynolds number are found on the basis of power-law indexes used.…”

Section: Introductionmentioning

confidence: 99%

Computational Analysis of Fluid Flow through a Sine-Curved Channel with High Reynolds Number

Memon

Bhatti

et al. 2021

Mathematical Problems in Engineering

Self Cite

View full text Add to dashboard Cite

In this paper, we attend to investigate the steady flow of a Newtonian fluid through a sine-curved channel working with the least-square technique of Galerkin’s approach. We implement the whole simulation using Comsol Multiphysics 5.4. To study the fluid flow through this channel, we take the Reynolds numbers in the range from 1000 to 10,000 and amplitude of the sine-curved channel in the range from 10 cm to 30 cm. We examine the flow rate and pressure at the outlet. It is observed that, at the outlet, maximum speed is increasing linearly along the Reynolds number and that the maximum pressure settled a negative relationship with the Reynolds number when increased. It is also determined that due to an increase in the hydraulic jumps, when increasing the amplitude of vibration of the channel, the velocity of flow got fluctuated at the above walls, which also results in a decline in the pressure from the inlet to exit of the channel. Moreover, the several correlations keeping amplitude as constant have been developed for the maximum flow velocity magnitude at the exit of the channel relating to the Reynolds number. These correlations will be definitely used for the future production and comparison for the fluid flow for the curvy channel.

show abstract

Finite Element Simulation of Newtonian and Non-Newtonian Fluid through the Parallel Plates Affixed with Single Screen

Cited by 8 publications

References 0 publications

Thermal decomposition of propylene oxide with different activation energy and Reynolds number in a multicomponent tubular reactor containing a cooling jacket

Thermal decomposition of propylene oxide with different activation energy and Reynolds number in a multicomponent tubular reactor containing a cooling jacket

On the Analysis of Power Law Fluid over a Diamond Shaped Cylindrical Surface with Screen Boundary Conditions at High Reynolds Number

Computational Analysis of Fluid Flow through a Sine-Curved Channel with High Reynolds Number

Contact Info

Product

Resources

About