A Numerical Method for Simulation of Incompressible Three-Dimensional Newtonian and Non-Newtonian Flows

Zdanski, P. S. B.; Vaz, M.

doi:10.1080/10407790.2011.572727

Cited by 10 publications

(4 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The solution procedure follows a pseudo-transient march in time, aiming at the steady-state solution. The present work constitututes an extension of the author's methodology (Zdanski et al, 2004;Zdanski et al, 2008;Zdanski and Vaz Jr., 2011) for solving turbulent flows of binary mixtures. The main general steps of the present scheme are given in sequence.…”

Section: Numerical Methodologymentioning

confidence: 99%

“…The numerical scheme applied by the authors was originally proposed for solving turbulent Newtonian flows (Zdanski et al 2004). The present methodology was also applied successfully to solve non-Newtonian polymer melt flows inside channels (Zdanski et al, 2008;Zdanski and Vaz Jr., 2011). Therefore, the present work performs an extension of the author's methodology for solving turbulent flows of binary mixtures, including the solution of the concentration equation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Simulation of the Incompressible Turbulent Flow of a Binary Mixture of Air-Water Vapor: Applications in Drying Process

Zdanski

Silva²

2016

Braz. J. Chem. Eng.

Self Cite

View full text Add to dashboard Cite

-The present work deals with numerical simulation of the incompressible turbulent flow of a binary mixture air-water vapor inside channels. Calculations are performed using the RANS (Reynolds Average Navier-Stokes Equations) formulation in addition to the standart k-ε turbulence model. The mathematical model is discretized by a finite difference scheme, being adopted second order accurate expressions for both convection and diffusion terms. The mesh arrangement is collocated and artificial dissipation terms are added to control the odd-even decoupling problem. The numerical scheme is applied to solve the flow of a binary mixture of air-water vapor inside plane channels and sudden expansions. The validation performed indicates that the present method reproduces satisfactorily the literature data for both concentration profiles and Sherwood number. Furthermore, the parametric analysis performed indicates that the drying process (wall mass flux) is very sensitive to the flow parameters investigated, i.e., inlet flow velocity and channel expansion ratio.

show abstract

Section: Numerical Methodologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Incompressible Turbulent Flow of a Binary Mixture of Air-Water Vapor: Applications in Drying Process

Zdanski

Silva²

2016

Braz. J. Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…For example, Young [16] applied the lattice Boltzmann method (LBM) to simulate and analyze the behavior of molten ABS and PS polymers using 1 100 mm s − as gate inlet velocity. When proposing a new numerical scheme to simulate molten polymers, Zdanski and Vaz [17] used a gate inlet velocity of 1 60 mm s − to simulate the POM polymer in geometries with abrupt expansions. Using the same analogy of abrupt expansions, Tutar and Karakus [18] applied three different inlet velocities to evaluate the thermophysical properties of the molten PP polymer, which were 1 10 mm s − , 1 30 mm s − and 1 60 mm s − .…”

Section: Introductionmentioning

confidence: 99%

A methodology for determination the inlet velocity in injection molding simulations

Miranda,

Rauber,

Vaz Jr.

et al. 2024

Polímeros

View full text Add to dashboard Cite

The inlet velocity of thermoplastic in injection molds plays a crucial role in obtaining high-quality polymer parts and the final performance of the product. It is known that the way the polymer is injected into the mold can directly affect important properties, such as the distribution of internal stresses, the cooling rate and the formation of surface defects. However, there are injection molding machines that only control injection pressure and dosage, making it difficult to obtain the gate inlet velocity into the mold cavity. Besides, some molds have many injection channels as well as complex inlet geometries, which make a challenging task to identify the inlet velocity. This study presents numerical and experimental approaches on how to determine the entry velocity in thermoplastic injection molds. The main results showed that these methods are highly efficient and contribute to identifying the gate inlet velocity with good accuracy.

show abstract

“…Zdanski and Vaz [33] have implemented a secondorder finite difference scheme to simulate a flow problem of incompressible 3D viscous fluid flow in a channel. Abbasi et al [34] have numerically analyzed the impacts of hydrodynamic forces over a cylinder-based Lattice Boltzmann Method (LBM) at low Reynolds number.…”

Section: Introductionmentioning

confidence: 99%

Topological Characteristics of Obstacles and Nonlinear Rheological Fluid Flow in Presence of Insulated Fins: A Fluid Force Reduction Study

Majeed

Jarad

Rasheed

et al. 2021

Mathematical Problems in Engineering

View full text Add to dashboard Cite

In this work, a comprehensive study of fluid forces and thermal analysis of two-dimensional, laminar, and incompressible complex (power law, Bingham, and Herschel–Bulkley) fluid flow over a topological cross-sectional cylinder (square, hexagon, and circle) in channel have been computationally done by using finite element technique. The characteristics of nonlinear flow for varying ranges of power law index 0.4 ≤ n ≤ 1.6 , Bingham number 0 ≤ Bn ≤ 50 , Prandtl number 0.7 ≤ Pr ≤ 10 , Reynolds number 10 ≤ Re ≤ 50 , and Grashof number 1 ≤ Gr ≤ 10 have been examined. Considerable evaluation for thermal flow field in the form of dimensionless velocity profile, isotherms, drag and lift coefficients, and average Nusselt number Nu avg is done. Also, for a range of Bn , the drag forces reduction is observed for circular and hexagonal obstacles in comparison with the square cylinder. At Bn = 0 corresponding to Newtonian fluid, maximum reduction in drag force is reported.

show abstract

A Numerical Method for Simulation of Incompressible Three-Dimensional Newtonian and Non-Newtonian Flows

Cited by 10 publications

References 26 publications

Numerical Simulation of the Incompressible Turbulent Flow of a Binary Mixture of Air-Water Vapor: Applications in Drying Process

Numerical Simulation of the Incompressible Turbulent Flow of a Binary Mixture of Air-Water Vapor: Applications in Drying Process

A methodology for determination the inlet velocity in injection molding simulations

Topological Characteristics of Obstacles and Nonlinear Rheological Fluid Flow in Presence of Insulated Fins: A Fluid Force Reduction Study

Contact Info

Product

Resources

About