Point Fluid Simulator

Wonmo Seong

In-app purchases

About this app

Point Fluid Simulator is a 3D fluid simulator, wind tunnel and CFD lab for aerodynamics that runs in real time on your device's GPU. Every simulation is drawn as a living point cloud of tracer particles that you can orbit, zoom and push around.

NAVIER–STOKES SANDBOX
Solve the incompressible Navier–Stokes equations on a 3D grid and watch them work. Fire a vortex ring, roll up a Kelvin–Helmholtz shear layer, drive a lid-driven cavity, shoot a jet or let a Taylor–Green vortex break down into turbulence. Set the Reynolds number, add vorticity confinement, and colour the points by speed, pressure or vorticity. Switch to Push and drag to stir.

WIND TUNNEL
Put a cylinder or sphere in the flow and see a von Kármán vortex street appear behind it. Shape your own NACA airfoil with camber, thickness, chord and angle of attack. With Pro, add flaps and leading-edge droop, build a 3D wing with span, taper, sweep, dihedral, twist and winglets, save designs A, B and C to compare their lift and drag curves, and test a simple aircraft, a car, a cube or your own OBJ model. Smoke streaklines and streamlines show the flow; surface points show the pressure coefficient. Lift, drag and pitching-moment coefficients update live and plot over time, and an angle-of-attack sweep draws the lift curve and marks the stall.

ENGINEERING WIND TUNNEL (PRO)
Import your own model as OBJ, STL, PLY or GLB, set its units and orientation, check that it is watertight and fill holes. Enter real conditions (air or water, speed, temperature, altitude) and run a high-fidelity lattice-Boltzmann solver with an LES turbulence model, sized around the model to keep blockage low. Read time-averaged drag, lift, side force and moments in coefficients and newtons, with convergence, blockage correction and the shedding frequency. Run pitch, yaw or speed sweeps and a grid-refinement check, show vortices, surface oil flow, a wake survey and Cp sections, compare saved runs, and export a PDF report, CSV tables and VTK or VTU files for ParaView. It is early-stage screening, not certified CFD: use it to compare concepts and confirm decisions with validated tools or tests. (USDZ import is on Apple devices only.)

PLAYGROUND (PRO)
Break a dam, drop a splash, pour from a spout or spin a rotating tank with thousands of particle-based liquid points. Light a fire or a smoke plume that rises by buoyancy.

LEARN THE PHYSICS
Short, clearly typeset explanations of every term: advection, pressure, viscosity, incompressibility, the Reynolds number, vorticity, lift and drag, particles for liquids and buoyancy.

HONEST NUMBERS
The solver is tested against known results: viscous energy decay of the Taylor–Green vortex, the Ghia et al. lid-driven cavity at Re = 100, vortex shedding behind a cylinder and the drag of a sphere. Grids are coarse so it runs in real time; results are educational approximations, not validated CFD.

FAST
Runs on the GPU of your phone or tablet with quality tiers that keep it cool.

POINT FLUID PRO
Free: the Navier–Stokes sandbox at Low and Medium resolution and the wind tunnel with a cylinder, a sphere and an editable NACA airfoil.
Pro adds High and Ultra resolution, the full wing editor (flaps, 3D wings, design comparison), every wind tunnel body and model import, the engineering wind tunnel, angle-of-attack sweeps and polar plots, the liquid, smoke and fire playground, and export of PLY point clouds and CSV data.
Pro is available as a monthly or yearly subscription (the yearly plan starts with a 7-day free trial) or a one-time lifetime purchase. Orchestr Education, a subscription that also unlocks Pro in other Orchestr learning apps, is offered too.

Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage them in Google Play, Subscriptions.
Privacy: https://gist.github.com/wonmor/627dbb4ed9c6ec928d11267699d1592b

No ads. No tracking. Questions: [e-mail]

What’s new

Engineering wind tunnel (Pro): import OBJ, STL, PLY or GLB models, a high-fidelity lattice-Boltzmann solver with LES, real-world conditions, forces and moments, sweeps, grid refinement, vortex, oil-flow and wake tools, PDF and ParaView export. Early-stage screening, not certified CFD.