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Lattice Boltzmann method formulation for simulation of thermal radiation effects on non-Newtonian Al_(2)O_(3) free convection in entropy determination

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Applied mathematics and mechanics(English Edition) 2024年第6期45卷 1085-1106页

作者： m.NEmATI m.sefid A.KARImIPOUR A.J.CHAmKHA Faculty of mechanical Engineering Yazd UniversityYazd ***Iran Department of mechanical Engineering Najafabad BranchIslamic Azad UniversityNajafabad ***Iran Faculty of Engineering Kuwait College of Science and TechnologyDoha 35004Kuwait

The simultaneous investigation on the parameters affecting the flow of electrically conductive fluids such as volumetric radiation,heat absorption,heat generation,and magnetic field(mF)is very vital due to its existence in various sectors of industry and *** present research focuses on mathematical modeling to simulate the cooling of a hot component through power-law(PL)nanofluid convection *** temperature reduction of the hot component inside a two-dimensional(2D)inclined chamber with two different cold wall shapes is *** formulation of the problem is derived with the lattice Boltzmann method(LBm)by code writing via the FORTRAN *** variables such as the radiation parameter(0–1),the Hartmann number(0–75),the heat absorption/generation coefficient(−5–5),the fluid behavioral index(0.8–1.2),the Rayleigh number(103–105),the imposed mF angle(0°–90°),the chamber inclination angle(−90°–90°),and the cavity cold wall shape(smooth and curved)are *** findings indicate that the presence of radiation increases the mean Nusselt number value for the shear-thickening,Newtonian,and shear thinning fluids by about 6.2%,4%,and 2%,*** most cases,the presence of nanoparticles improves the heat transfer(HT)rate,especially in the cases where thermal conduction dominates *** is the lowest cooling performance index and mF effect for the cavity placed at an angle of 90°.The application in the design of electronic coolers and solar collectors is one of the practical cases of this numerical research.

关键词： thermal performance analysis heat absorption/generation power-law(PL)Al_(2)O_(3)nanofluid magnetohydrodynamics natural convection volumetric radiation inclined cavity

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Investigating and measurement of residues of D.D.T and D.D.E (Organoclorine pesticides) in four species of fishes in Caspian Sea (Iran)

Investigating and measurement of residues of D.D.T and D.D.E...

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The 3～(rd) International Conference on Natural Products :Natural Products -a must for Human Survival ABSTRACTS

作者： m.Shokrzadeh A.G.Ebadi Department of Toxicology Faculty of Pharmacy mazandaran University of medical Sciences Sari Iran Department of Experiential sciences Islamic Azad University of Sari Sari Iran

Pesticides are compounds that used by human being, espacially farmers for controlling biotical factors for a long time and can bring a lot of environmental problems. Among these compounds clorine insecticide sprays have high half-life, the property of maintaining for a long time and high lipophilicity characteristic due to having chronic consequences that resulted from consuming of this compounds, it is necessary to eva luation and analyze in environment especially in foods and also in fishes which have high fat and can carry this kind of insecticide sprays .So we have investigated the remaining of chloride oreganoinsecticide sprays such as D.D.T, D.D.E in the four kinds of fishes in the Caspian *** this investigation we have prepared four different kinds of fishes, which are highly used, available in the Caspian Sea (sefid - koli- kilca - kafal) that we selected five fish from the four different hunting region (Chalous and Babolsar city and Khazar Abad and miankaleh region ) in 2004. After cleaning, we prepared Hun muscle of the fished. Then, after the process of extraction, we distilled them in Vacuum by means of organic solvent and at last we evaluated the remaining and reported based on PPm by Gas Chromatography (GC) with ECD detector. The results of insecticides analyzed in four kinds of fishes been showed that the kafal kind of fish in the hunting region of Babolsar had the Highest amount of D.D.T at the rate of 0.031 *** in the hunting region of Babolsar was 0.03 PPm (Pmention that no research has sofar been done to be a criterion for comparison in this area. But, fortunately the amounts of the insecticide sprays has not reached to standard level in fishes, and it raises the alarm health.

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