Direct collapse black holes (DCBHs) are the leading candidates for origin of first supermassive holes. However, role magnetic fields during their formation is still unclear as none previous studies has been evolved long enough to assess impact accretion phase. Here, we report results from a suite 3D cosmological magneto-hydrodynamic (MHD) simulations which 1.6 Myrs comparable expected lifetime ...

eunsteady slip-flow of second grade non-newtonian electrically conducting fluid over an oscillating sheet has been considered and solved numerically. a second-order slip velocity model is used to predict the flow characteristic over the wall. with the assumption of infinite length in the x-direction, the velocity of the fluid can be assumed as a function of y and t, hence, with proper change va...

ABSTRACT Alfven wave is the single most important physical phenomenon of magneto-hydrodynamic (MHD) turbulence and has far-reaching impact to almost all studies related astrophysical magnetic field. Yet restoration fluctuations from a given field, aka local problem, never properly addressed in literature albeit its importance. Previous works model fluctuation as perturbation along straight-line...

We aim at demonstrating the capabilities of a newly developed method for determining electric currents in solar photosphere. employ three-dimensional radiative magneto-hydrodynamic (MHD) simulations to produce synthetic Stokes profiles several spectral lines with spatial resolution similar what operational 4-meter Daniel K. Inouye Solar Telescope (DKIST) telescope should achieve. apply inversio...

Giant planets embedded in protoplanetary disks (PPDs) can create annulus density gaps around their orbits the type-II regime, potentially responsible for ubiquity of annular substructures observed PPDs. Despite substantial amount works studying planet migration and gap properties, they are almost exclusively conducted under viscous accretion disk framework. However, recent studies have establis...

Squeezing flow of a Casson fluid is considered between two parallel disks. Upper disk is taken to be impermeable but capable of moving towards or away from the lower fixed and porous disk. Governing equations are derived with the help of conservation laws combined with suitable similarity transforms. Homotopy analysis method (HAM) is then been employed to determine the solution to resulting ord...

We compare the statistical properties of J=1→0 CO spectra observed in the Perseus Molecular Cloud with synthetic J=1→0 CO spectra, computed solving the non–LTE radiative transfer problem for a model cloud obtained as solutions of the three dimensional magneto–hydrodynamic (MHD) equations. The model cloud is a randomly forced super–Alfvénic and highly super–sonic turbulent isothermal flow. The p...

Abstract The nonlinear two-dimensional forced-convection boundary-layer magneto hydrodynamic (MHD) incompressible flow of nanofluid over a horizontal stretching flat plate with variable magnetic field including the viscous dissipation effect is solved using the Variational iteration method (VIM), homotopy perturbation method (HPM) and Adomian decomposition method (ADM). In the paper, our result...