371 research outputs found
Impact of thermal radiation and Joule heating on MHD mixed convection flow of a Jeffrey fluid over a stretching sheet using homotopy analysis method
No full textA mathematical model has been developed to study the Joule heating effect on mixed convection MHD dissipative and radiative flow of an incompressible Jeffrey fluid due to a stretching sheet with power law heat flux, heat source/sink and suction. Similarity transformations are adopted to acquire ordinary differential equations from the governed partial differential equations. Series solutions are procured for these ordinary differential equations by admitting homotopy analysis method (HAM). A decisive way of convergence of series solutions is also provided. Characteristics of dissonant parameters on velocity, temperature, skin friction coefficient and Nusselt number are collected and discussed through graphs and tables. It is seen that the velocity enhances with an increase in Deborah number. Further the temperature is a depreciating function of Deborah number
The study of three dimensional radiative MHD Casson nanofluid over an exponential porous stretching sheet with heat source under convective boundary conditions
No full textInvestigation of the Heat Transfer and Flow Characteristics on Hiemenz Flow under the Influence of Heat Source and Thermal Radiation with Hydrodynamic – Thermal Slips Effects
No full textChemically Radiative MHD Flow of a Micropolar Nanofluid over a Stretching/Shrinking Sheet with a Heat Source or Sink
No full textThis study examines the behavior of a micropolar nanofluid flowing over a sheet in the presence of a transverse magnetic field and thermal effects. In addition, chemical (first -order homogeneous) reactions are taken into account. A similarity transformation is used to reduce the system of governing coupled non-linear partial differential equations (PDEs), which account for the transport of mass, momentum, angular momentum, energy and species, to a set of non-linear ordinary differential equations (ODEs). The Runge-Kutta method along with shooting method is used to solve them. The impact of several parameters is evaluated. It is shown that the micro -rotational velocity of the fluid rises with the micropolar factor. Moreover, the radiation parameter can have a remarkable influence on the flow and temperature profiles and on the angular momentum distribution
Computational Modelling of Magneto-Hydrodynamic Casson nanofluid flow over an exponentially slendering surface with radiation and heat source
No full textEffect of viscous dissipation on upper–Convected maxwell fluid with cattaneo-Christov heat flux model using spectral relaxation method
No full textThe study observes the flow and heat transfer in upper-convected Maxwell fluid over a rapidly stretching surface with viscous dissipation. Cattaneo-Christov heat flux model has been used in the preparation of the energy equation. The model is used in guessing the impacts of thermal relaxation time over boundary layer. Similarity method has been used to keep normal the supervising boundary layer equations. Local similarity solutions have been obtained through spectral relaxation method. The fluid temperature has a relation with thermal relaxation time inversely and our calculations have shown the same.. In addition the fluid velocity is a receding activity of the fluid relaxation time. A comparative study of Fourier’s law and the Cattaneo-Christov’s law has been done and inserted in this
Thermal radiation and heat source effects on MHD non-Newtonian fluid flow over a slandering stretching sheet with cross-diffusion
No full textMagnetohydrodynamic non-Newtonian fluid flow over a stretching sheet with intermittent thickness under multifarious slips is appraised. Williamson fluid pattern is incorporated in this discussion. The energy and concentration equations are confederated with the repercussion of Soret and Dufour. We endorsed homotopy analysis method (HAM) to collocate the solutions of ODE. The graphical and tabular results for velocity, temperature, concentration, friction factor, heat and mass transfer rates when Λ = 0.0 (Newtonian fluid) and Λ = 0.2 (non-Newtonian fluid-Williamson fluid) are secured and discussed in detail
Indobathynella socrates Shaik 2019, n. sp.
No full text<i>Indobathynella socrates</i> n. sp. <p>(Figs. 1–7)</p> <p> <b>Diagnosis.</b> Body integument thin. Antennule 7-segmented; ultimate segment with2 equal aesthetascs. Antenna 4- segmented; exopod without subapical seta. Mandibular gnathobase fused with basal segment of palp and represented by 6 teeth. Paragnaths wedge-shaped with denticles on inner margin. Maxillulary distal endite with 7 armature elements including 3 smooth subterminal outer setae. Maxilla without inner proximal seta on second segment. Pleopod I slender, 1-segmented, bearing 2 normal plumose setae. Uropodal exopod with 2 setae only, ventro-medial seta being absent.</p> <p> <b>Type locality</b>. India, Andhra Pradesh State, ~ 8 km from Borra Caves in Visakhapatnam District, Karaiguda Cave, 18°18'.33.3''N, 0.83°01'31.9''E, elevation 838 m (Fig.1).</p> <p>The cave lies in the dense forest of Araku Valley of the Karaiguda hamlet in Ananthagiri Mandal of Visakhapatnam District, Andhra Pradesh State in southern India. The cave has small entrance that leads to a tunnel which is nearly 10 m long and 4 m wide with three irregular small side chambers. The floor is uneven, with a thick layer of gravel and some massive boulders. The interior of the cave is impressive with young (immature) stalactites and stalagmites. The entrance chamber has a lotic ecosystem, where the sample was collected in contrast to a lentic ecosystem inside the chambers. The abiotic parameters, as determined on 18 June 2013, were as follows: air temperature 31°C; water temperature 22°C; pH 7.1; humidty 88% and turbidity 0.84 NTU. No publications report on the biology of the cave till now.</p> <p> <b>Material examined.</b> Holotype female dissected on 3 slides (MNHN-IU- 2017-76) and 3 female paratypes are in author’s collection. Collector, S. Shaik, 18 June 2013.</p> <p> <b>Description of adult female (Holotype).</b> Total body length of holotype 0.7 mm. Body elongate, poorly chitinised and imperforated, 11.5 times as long as wide. In lateral view, pleomeres wider than thoracomeres. Head 1.2 times as long as wide, 1.5 times as long as first 2 thoracomeres combined.</p> <p>Antennule (Figs. 2A, 3A): 7-segmented, 33.3% longer than head; first three segments together 1.6 times longer than next four segments. First segment with 4 plumose setae and 1 simple seta, as illustrated. Second segment with 3 dorsal, plumose setae in a row near outer distal corner and 1 simple seta at inner distal corner. Third segment with 2 unequal simple setae on outer margin. Inner flagellum somewhat squarish, with 3 unequal simple setae. Fourth segment with stout apophysis overreaching midlength of sixth segment and with 2 plumose setae apically and1 plumose seta on small protuberance beside apophysis. Fifth segment smallest, with 1 simple seta at inner distal corner. Sixth segment with 3 unequal simple setae on distal margin, and 2 unequal aesthetascs at inner distal corner. Seventh segment with 4 unequal setae and 2 equal aesthetascs.</p> <p>Antenna (Figs. 2A, 3B): 4-segmented, perpendicular to antennule and 44% shorter than antennule. Exopod shorter than first endopodal segment, with 1 apical seta, which is stout, with bulbous swelling subproximally and bifurcating distally into unusually long, smooth sensory flagella; subapical simple seta absent. Endopod 2- segmented; first segment 0.7 times as long as second segment; plumose seta on second segment absent. Basis unarmed. Setal formula: 0/0+exp/1+0/4.</p> <p>Labrum (Fig. 3C): smooth, apically narrow, somewhat triangular in outline.</p> <p>Paragnaths (Fig. 3D): wedge-shaped, proximally fused with each other, inner margin fringed with 13 denticles on each side.</p> <p> Mandible (Fig. 4A): prehensile. Palp 3-segmented; basal segment slender, somewhat rectangular and slightly shorter than second segment, which is elongately oval; third segment smallest, with 2 unequal sturdy apical setae, about as long as second segment and distal outer margin finely spinulose. Gnathobase fused with basal segment of palp and masticatory part represented by 6 teeth: incisor process (<i>pars incisiva</i>) with two teeth; <i>processus incisivus accessorius</i> with one small tooth but without basal seta; pars molaris with three large and un equal teeth.</p> <p>Maxillule (Fig. 4B): proximal endite with only 1 smooth slender claw. Distal endite subcylindrical, 1.5 times as long as wide, bearing 2 apical claws of equal length, 2 almost equal claws on inner margin, and 3 setae on outer distal margin, close to the apex; all armature elements smooth</p> <p>Maxilla (Fig. 4C): 3-segmented; strongly prehensile. First segment somewhat squarish and bare. Second segment subcylindrical, 1.9 times as long as maximum width and armed with 6 setae distally, as illustrated, and no additional seta on inner proximal margin. Third segment smallest, somewhat trapezoidal, bearing 1 simple seta at inner distal corner and 1 moderately stout, incurved, smooth prehensile, apically inwardly bent claw; claw shorter than second segment.</p> <p>Th I–VII (Figs. 5 A–D, 6A–C): length increasing from Th I–III; Th IV–VII nearly similar in size. Th I without epipod; basis with 1simple seta at inner distal corner; seta shorter than first endopodal segment. Th II–VII with somewhat clavate, 1-segmented epipod, overreaching midlength of basis; coxa without plumose seta; basis unarmed. Th I–VII with 2-segmented exopod; Th I first exopodal segment with 2 short, bipinnate setae; Th II–VII first exopod segment with 1 short, dorsal and 1 long, ventral ciliated setae; dorsal ctenidia present distally on Th I– VII, as illustrated. Second exopodal segment shorter than first one and with 2 unequal ciliated terminal setae; Endopod 3-segmented and longer than exopod on Th I, but 2-segmented and distinctly slender and about as long as first exopodal segment on Th II–VII; number and distribution of ctenidia on different segments of Th I–VII as illustrated. Setal formulae: Th I: 0+0/1+0/1; Th II-VII: 0+0/1.</p> <p>Th VIII (Fig. 7C): club-shaped and distinct at base.</p> <p>Pleopod I (Figs. 2D, 7B): 1-segmented, slender, 4.8 times as long as wide, carrying 2 unequal plumose setae, 1 apical and 1 outer subapical. Uropod (Figs. 2C, 7A): sympod 2.6 times as long as wide, bearing 3 serrulate, somewhat diagonally arranged, claw-like spines at inner distal corner; proximal-most spine relatively long; distal 2 spines equal in size (Fig. 7A). Exopod subapical, 4.0 times as long as wide, with 1 apical and 1 outer subapical ciliated setae; apical seta 2.8 times as long as subapical seta; and ventro-medial seta absent. Endopod nearly cylindrical, 53.4% shorter than sympod, with 3 armature elements: 1 inner subapical serrulate claw-like spine, 1 similar but relatively long inner apical spine both spines somewhat swollen basally; and 1 long outer ciliated seta close to base of apical spine.</p> <p>Pleotelson (Fig. 7A): with 1 strong, dorsal ciliated seta on either side of median axis, not far from base of caudal furca; seta longer than caudal furca.</p> <p>Anal operculum (Fig. 7A): concave medially.</p> <p>Caudal furca (Fig. 7A): as long as distal width and with 4 unequal serrulate spines (1 apical, 3 inner) and 1 long, spiniform ciliated seta at outer distal corner; apical spine longest; 1 complete transverse row of spinules occurring disto-ventrally. Furcal organ not discernible.</p> <p>Male.— Not known.</p> <p> <b>Distribution and ecology.</b> <i>Indobathynella socrates</i> <b>n. sp.</b> is so far known only from its type locality. It was collected by coring the sandy sediments of a fast-flowing stream within the cave under typically dark conditions.</p> <p> <b>Co-occurrence.</b> The new species was accompanied by a dense population of unidentified Copepoda Cyclopoida, Nematoda, Oligochaeta, insect larvae and <i>Parastenocaris</i> Kessler, 1913 sp.</p> <p> <b>Etymology.</b> The species is named in honor of Socrates, a classical Greek philosopher, who is considered one of the founders of western philosophy. The specific epithet is a noun in apposition to the feminine genus name.</p>Published as part of <i>Shaik, Shabuddin, 2019, A New Indobathynella Species from an Indian Cave. The First Cavernicolous Bathynellidae (Syncarida: Bathynellacea) from South-eastern India, pp. 345-360 in Zootaxa 4565 (3)</i> on pages 346-354, DOI: 10.11646/zootaxa.4565.3.2, <a href="http://zenodo.org/record/2590270">http://zenodo.org/record/2590270</a>
Cattaneo-Christov heat flux on UCM flow across a melting surface with cross diffusion and double stratification,
No full textMultiple slip conditions on MHD Carreau Dusty fluid over sheet with Cattaneo-Christov heat flux and thermal radiation
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