Sharif Digital Repository

Entropy generation analysis of thermally developing forced convection in fluid-saturated porous medium

Author

Hooman, K.

Pub. Year

2008

Subjects

Energy transfer. / Entropy. / Forced convection. / Mathematical models. / Number theory. / Parameter estimation. / Energy flux vectors. / Entropy generation. / Heatline. / Porous materials.

Entropy generation for forced convection in a porous channel with isoflux or isothermal walls

Author

Hooman, K.

Publisher

Inderscience Publishers,

Pub. Year

2008

Subjects

Boundary conditions. / Forced convection. / Heat flux. / Numerical methods. / Peclet number. / Porous materials. / Bejan number. / Entropy generation. / Isoflux walls. / Isothermal walls. / Porous channel. / Entropy.

Modelling the temperature rise effect through high-pressure torsion

Author

Parvin, H.

Publisher

Taylor and Francis Ltd

Pub. Year

2016

Subjects

Modelling. / Microstructural evolution. / Models. / Plastic flow. / Temperature. / Thermodynamics. / Torsional stress. / Dislocation densities. / Dislocation modeling. / Grain size. / High pressure torsions. / Taylor theory. / Temperature rise. / High pressure effects.

Two-internal variable thermodynamics modelling of severe plastic deformation: Dislocation and flow stress evolutions

Author

Parvin, H.

Publisher

Maney Publishing,

Pub. Year

2015

Subjects

Model. / Activation energy. / Microstructural evolution. / Plastic deformation. / Plastic flow. / Thermodynamics. / Dislocation densities. / Heterogeneous distributions. / Multi-variable models. / Self-diffusion activation energy. / Severe plastic deformations. / Stacking fault energies. / Subgrain boundaries. / Thermodynamics model. / Multivariable systems.

Dependency modeling of steady state grain size on the stacking fault energy through severe plastic deformation

Author

Parvin, H.

Publisher

Elsevier,

Pub. Year

2015

Subjects

Deformation and fracture. / Severe plastic deformation. / Simulation and modeling. / Stacking fault energy. / Steady state grain size. / Chemical activation. / Grain size and shape. / Plastic deformation. / Thermodynamics. / Deformation and fracture. / Grain size. / Severe plastic deformations. / Simulation and modeling. / Stacking fault energies. / Activation energy.

Limiting grain size through high-pressure torsion of different materials

Author

Parvin, H.

Publisher

Taylor and Francis Ltd,

Pub. Year

2020

Subjects

Grain refining. / High-pressure torsion. / Limiting grain size. / Modelling. / Thermodynamics. / Equal channel angular pressing. / Grain size and shape. / High pressure engineering. / Models. / Pressing (forming) / Thermodynamics. / Dislocation densities. / Grain refining. / Grain size. / High pressure torsions. / Limiting grain sizes. / Material parameter. / Torsional stress.

Strength evolution during accumulative roll bonding of the metal matrix composite

Author

Parvin, H.

Publisher

Elsevier Editora Ltda,

Pub. Year

2023

Subjects

Accumulative roll bonding. / Grain refining. / Modeling. / Severe plastic deformation.

Modeling the effect of Mg addition on microstructure and strength of aluminum during severe plastic deformation

Author

Parvin, H.

Pub. Year

2024

Subjects

Magnesium alloys. / Microstructure. / Plastic deformation. / AlMg alloy. / Dislocations densities. / Mg additions. / Mg solute. / Microstructure evolutions. / Property. / Pure Al. / Severe plastic deformations. / Solute content. / Strength. / Aluminum.

Pressure dependence of the small-signal gain and saturation intensity of a copper vapor laser

Author

Behrouzinia, S.

Pub. Year

2003

Subjects

Electric discharges. / Stimulated emission. / Power amplifiers. / Photons. / Oscillators (electronic) / Laser pulses. / Gain measurement.

Study of cemented carbonitrides with nickel as binder: Experimental investigations and computer calculations

Author

Mohammadpour, M.

Pub. Year

2012

Subjects

Cemented carbonitride. / Surface modification. / Binder phase. / Carbonitrides. / Cemented carbides. / Computer calculation. / Eta phase. / Experimental investigations. / Formation process. / Free layers. / Grain refinement effects. / Hardmetals. / In-vacuum. / Initial composition. / Labyrinth factor. / Linear relationships. / Metallic tungsten. / Powder mixtures. / SEM micrographs. / Simulation. / Sintered specimen. / State of the art. / Surface modified layer. / Thermocalc. / Thermodynamic calculation. / Transition metal carbide. / Transverse rupture strength. / Vanadium carbides. / Weight ratios. / Binders. / Carbon nitride. / Cobalt. / Computer software. / Grain refinement. / Hardness. / Nickel. / Niobium. / Powder metals. / Sintering. / Surface treatment. / Tantalum. / Tantalum carbide. / Tungsten. / Vanadium. / Tungsten carbide.

Investigation of online detected partial discharges in power transformer

Author

Ghaffarian, M.

Pub. Year

2008

Subjects

De-Noise. / De-noised signals. / De-noising and on-line monitoring. / Distribution transformer. / Frequency spectra. / Measured signals. / Online monitoring. / Partial discharge detection. / Recorded signals. / Wavelet package. / Electric instrument transformers. / Frequency bands. / Power transformers. / Transformer substations. / Voltage measurement. / Wavelet transforms. / Partial discharges.