Mixed convection Jeffrey fluid flow over an exponentially stretching sheet with magnetohydrodynamic effect

Ahmad, Khaliq; Hanouf, Zahir; Ishak, Anuar Mohd

doi:10.1063/1.4945401

Cited by 55 publications

(23 citation statements)

References 17 publications

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“…Also, the Jeffrey's fluid model approximates well the rheological behaviour of a wide range of industrial processes such as biotechnological detergents, physiological suspensions, dense foams, geological sediments, cosmetic creams, syrups, etc. Many researchers explored the industrial and biological flow problems using Jeffrey's model that include Katini Ahmad et al [12] investigated the magnetohydrodynamic mixed convection boundary layer flow and heat transfer of Jeffrey fluid past an exponentially stretching sheet. Saqib et al [13] reported the applications of Caputo-Fabrizio time-fractional derivatives to generalize the Jeffrey fluid past a vertical static plate.…”

Section: U Sir Is a DI Git Al C Oll E C Tio N Of T H E R E S E A R C mentioning

confidence: 99%

Effects of ramped wall temperature and concentration on viscoelastic Jeffrey’s fluid flows from a vertical permeable cone

Gaffar¹,

Prasad

Bég

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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In thermo-fluid dynamics, free convection flows external to different geometries such as cylinders, ellipses, spheres, curved walls, wavy plates, cones etc. play major role in various industrial and process engineering systems. The thermal buoyancy force associated with natural convection flows can exert a critical role in determining skin friction and heat transfer rates at the boundary. In thermal engineering, natural convection flows from cones has gained exceptional interest. A theoretical analysis is developed to investigate the nonlinear, steady-state, laminar, non-isothermal convection boundary layer flows of viscoelastic fluid from a vertical permeable cone with a power-law variation in both temperature and concentration. The Jeffery's viscoelastic model simulates the non-Newtonian characteristics of polymers, which constitutes the novelty of the present work. The transformed conservation equations for linear momentum, energy and concentration are solved numerically under physically viable boundary conditions using the finitedifferences Keller-Box scheme. The impact of Deborah number (De), ratio of relaxation to retardation time (), surface suction/injection parameter (fw), power-law exponent (n), buoyancy ratio parameter (N) and dimensionless tangential coordinate () on velocity, surface temperature, concentration, local skin friction, heat transfer rate and mass transfer rate in the boundary layer regime are presented graphically. It is observed that increasing values of De reduces velocity whereas the temperature and concentration are increased slightly. Increasing  enhance velocity however reduces temperature and concentration slightly. The heat and mass transfer rate are found to decrease with increasing De and increase with increasing values of . The skin friction is found to decrease with a rise in De whereas it is elevated with increasing values of . Increasing values of fw and n, decelerates the flow and also cools the boundary layer i.e. reduces temperature and also concentration. The study is relevant to chemical engineering systems, solvent and polymeric processes.

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Section: U Sir Is a DI Git Al C Oll E C Tio N Of T H E R E S E A R C mentioning

confidence: 99%

Effects of ramped wall temperature and concentration on viscoelastic Jeffrey’s fluid flows from a vertical permeable cone

Gaffar¹,

Prasad

Bég

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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“…However, in this research 40 elements were observed in glutinous rice of mandotisalunkanan, kendenan and black glutinous rice ( Figure 5) with the XRF technique. 26 important elements have been detected in rice with several techniques [49,50]. From the research results, the determination of elements withfluorosence X-ray, 12 elements was detected, Fe and Cu is not found in all three types of glutinous rice.…”

Section: Crystallinitymentioning

confidence: 99%

Antioxidant, Nutrition, and Crystallinity Properties From Three Kind of Glutinous Rice of Enrekang Regency, South Sulawesi Indonesia

Kiay

Tawali

Tahir

et al. 2019

Int. J. Adv. Sci. Eng. Inf. Technol.

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This research was carried out using a laboratory experiment method, which analyzed the total phenolic content (TPC), antioxidant activity, total anthocyanin, vitamins and the degree of crystallinity with XRD (X-ray Diffractometer), as additional data, analyzed all the elements contained in rice using the X-ray Fluorescence method. The research results showed that the total of Mandoti Kendenan glutinous rice phenol is higher than the other two glutinous rice, respectively 6.88 mg / g (MKR) and 6.74 mg / g (MSR) and 6.24 mg / g (BGR). Glutinous rice from Mandoti Salunkanan and Kendenan has an anthocyanin total of 5.03 mg / g sample and 3.96 mg / g sample is lower than black glutinous rice ie (119.42 mg / g sample). Evaluation of physicochemical properties obtained 11.6-15.01% moisture content, average protein content of 7.98-8.36%, fat content of 1.74-2.25%, total carbohydrates of 88.07-88.49%, and ash content of 0.86-1.15%. Vitamins obtained in all three types of rice showed vitamin B1 in black glutinous rice, namely (0.22) and Mandoti Salunkananglutinous rice of 0.45 but were not detected in the type of Mandoti Kendenan glutinous rice, vitamin B3 was found in all three types of black glutinous rice with values (2.15, 1.63, and 2.76) average total minerals of Cu (0.11), Fe (0.26) and Zn (0.86) (P ≤ 0.05). The conclusion of this research is that the three types of glutinous rice has antioxidant activity and important components of vitamins and minerals.

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“…A total of about 26 essential elements such as Al, Ca,Cu,S, N, Fe, K, Mg, Mn,Na, P,Ti, Si ,Cl,Ni, Mo and Zn have been detected in rice by several techniques [28] including X-ray flouresence and ICP. The presence of toxic elements and pesticide residues [29] is an other important and serious aspect of health. Atomic Absorption Spectrometry, inductively coupled plasma atomic emission spectrometry (ICP-OES), energy dispersive X-ray spectrometry and X-ray fluorescence techniques (XRF) are commonly used for the detection of the elements [30].…”

Section: Elemental Determination By Xrfmentioning

confidence: 99%

Physical Properties and Glycemic Index Studies of Singaraja White Rice Grown by Conventional and Organic Methods in Denpasar Bali Indonesia

Andriani

Hamid

Sahrom

et al. 2018

Int. J. Adv. Sci. Eng. Inf. Technol.

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Both Singaraja white rice grown by organic and conventional method showed similar quality and posses glycemic index of 46.8±4.03 and 48.2±4.65 respectively. These values are lesser than the commercial Basmati rice of 50±5.8 which is in the low GI category. The scanning electron macroscopy photomicrograph of the transversal section of both rices show the array of crystalline blocks from the central endosperm area toward the outer part. The blocks are surrounded by polyhedral crystallites of the size between 3-6 microns. The polyhedral crystalline seem to be more dominant in the conventional rice. X-ray difrractograms of the rice indicate about 24% crystallinity with amylose dihydrate exist as polymorph in the organic rice. Elemental analysis data by XRF indicate organic rice contains slightly higher Magnesium and Phosphorus. Other elements detected were K, Al, S, Cl,O, Si, Zn, Ru, Ni, Pd and Fe. However, no iron was detected in the conventional rice. On the other hand no calcium was detected in the organic rice. Thermogravimetric study showed the solid rice is stable up to about 200°C with the loss of water molecules at about 90°C.

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Mixed convection Jeffrey fluid flow over an exponentially stretching sheet with magnetohydrodynamic effect

Cited by 55 publications

References 17 publications

Effects of ramped wall temperature and concentration on viscoelastic Jeffrey’s fluid flows from a vertical permeable cone

Effects of ramped wall temperature and concentration on viscoelastic Jeffrey’s fluid flows from a vertical permeable cone

Antioxidant, Nutrition, and Crystallinity Properties From Three Kind of Glutinous Rice of Enrekang Regency, South Sulawesi Indonesia

Physical Properties and Glycemic Index Studies of Singaraja White Rice Grown by Conventional and Organic Methods in Denpasar Bali Indonesia

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