90okm Posted November 22, 2015 Share Posted November 22, 2015 (edited) Hi! What is the difference between solver inputs (pre-solve, velupdate, advection, post-solve)? as for instance i may plug my gasfieldvop1 microsolver in any pyro solver inputs. the simulation looks the same in any case. may be for this particular microsolver it does not matter , but for another microsolver it will do ? solver.hipnc Edited November 22, 2015 by 90okm Quote Link to comment Share on other sites More sharing options...

xs2222 Posted November 22, 2015 Share Posted November 22, 2015 correct me if i am wrong , from what i understand , a quick explanation to this is , the solver is composed of many parts which is solving the navier stokes equation for fluids , according the the equation the velocity is solved and updated at every point , so post solve and pre solve are computed before and after solving the field , which then updates the position /density/pressure etc of the point update velocity modifies the solved velocity field and advection uses this velocity field to advect the input points around using this filed , of course there is more to solving the navier stokes equation , just to explain what these inputs are on this solver more in depth explanation can be found here Wikipedia https://en.wikipedia.org/wiki/Navier%E2%80%93Stokes_equations Flow velocity[edit]The solution of the Navier–Stokes equations is a flow velocity. It is a field, since it is defined at every point in a region of space and an interval of time. Once the velocity field is calculated, other quantities of interest, such as pressure or temperature, may be found. This is different from what one normally sees in classical mechanics, where solutions are typically trajectories of position of a particle or deflection of a continuum. Studying velocity instead of position makes more sense for a fluid; however for visualization purposes one can compute various trajectories. General continuum equations[edit]Main article: Derivation of the Navier–Stokes equations See also: Cauchy momentum equation § Conservation form The Navier–Stokes momentum equation can be derived as a particular form of the Cauchy momentum equation. In an inertial frame of reference, the conservation form of the equations ofcontinuum[disambiguation needed] motion is:^{[2]} Cauchy momentum equation (conservation form) where is the density, is the flow velocity, is the del operator. is the pressure is the identity matrix is the deviatoric stress tensor, which has order two, represents body accelerations (per unit mass) acting on the continuum, for example gravity, inertial accelerations, electric field acceleration, and so on. Quote Link to comment Share on other sites More sharing options...

xs2222 Posted November 22, 2015 Share Posted November 22, 2015 this vimeo video explains it better it is in russian , , but have english subtitles Quote Link to comment Share on other sites More sharing options...

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