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This article mainly concerns theoretical research on entropy generation influences due to heat transfer and flow in nanofluid suspensions. A conventional nanofluid of alumina-water (Al 2 O 3-H 2 O) was considered as the fluid model. Due to the sensitivity of entropy to duct diameter, mini-and microchannels with diameters of 3 mm and 0.05 mm were considered,… (More)

Thermal characteristics of turbulent nanofluid flow in a rectangular pipe have been investigated numerically. The continuity, momentum, and energy equations were solved by means of a finite volume method (FVM). The symmetrical rectangular channel is heated at the top and bottom at a constant heat flux while the sides walls are insulated. Four different… (More)

The entropy generation based on the second law of thermodynamics is investigated for turbulent forced convection flow of ZrO2-water nanofluid through a square pipe with constant wall heat flux. Effects of different particle concentrations, inlet conditions and particle sizes on entropy generation of ZrO2-water nanofluid are studied. Contributions from… (More)

Keywords: Separation flow Backward-facing step Turbulent and laminar flow Nanofluid a b s t r a c t This paper presents a numerical study of heat transfer to turbulent and laminar Cu/water flow over a backward-facing step. Mathematical model based on finite volume method with a FORTRAN code is used to solve the continuity, momentum, energy and turbulence… (More)

BACKGROUND
The objective was to determine the predictors of posttraumatic psychiatric disorders (PTPD) during the first 6 months following traumatic brain injury (TBI) focusing on neuroimaging, clinical and neuropsychological appraisements during acute and discharge phase of TBI.
MATERIALS AND METHODS
We designed a prospective, longitudinal study in which… (More)

- Mohammad Safaei, Ali-Reza Fallah-Khair, Reza Seyed-Sharifi, Haghbin Hadi, Nazarpak, Abdollah Sobhabi +1 other
- 2010

Weights of Iranian Baluchi sheep, from birth to 180 d of age, recorded every month, were analyzed using Random Regression Models. Independent variables were Legendre polynomials of age at recording. Up to four sets of random regression coefficients were fitted for animals' direct and maternal additive genetic and permanent environmental effects. Changes in… (More)

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