Fluids v.3

R. Hoetzlein (c) 2012, http://fluids3.com

Fluids v.3 is a large-scale, open source fluid simulator for the CPU and GPU using the smooth particle hydrodynamics method. Fluids is capable of efficiently simulating up to 8 million particles on the GPU (on 1500 MB of ram).

Requirements: Fluids v.3 requires a CUDA-capable NVIDIA graphics card /w Compute capability 2.1 or higher. Builds tested on Windows 7 with Visual Studio 2010

Start Fluids by running fluids_v3.exe See below for License terms. See website for software details.

Fluids makes use of the following libraries: CUDA - http://www.nvidia.com/object/cuda_home_new.html OpenGL - http://www.opengl.org/ FreeGlut - http://freeglut.sourceforge.net/ TinyXML - http://www.grinninglizard.com/tinyxml/index.html Glee - http://elf-stone.com/glee.php

Keyboard commands:

H Turn scene info on/off N, M Change number of particles [, ] Change example scene (loaded from scene.xml) F, G Change algorithm (CPU, GPU, etc.) J Change rendering mode (points, sprites, spheres) C Adjust camera (using mouse) L Adjust light (using mouse) A,S,W,D Move camera target 1 Draw acceleration grid 2 Draw particle IDs (be sure # < 4096 first) ~ Start video capture to disk (tilde key) -, + Change grid density

Scene parameters:

• Example scenes are loaded from the scene.xml file All parameters are permitted in either Fluid or Scene sections. DT Simulation time step SimScale Simulation scale (see website) Viscosity Fluid viscosity coefficient RestDensity Fluid rest density Mass Fluid particle mass Radius Fluid particle radius, only for boundary tests IntStiff Fluid internal stiffness (non-boundary) BoundStiff Fluid stiffness at boundary BoundDamp Fluid damping at boundary AccelLimit Acceleration limit (for stability) VelLimit Velocity limit (for stability) PointGravAmt Strength of point gravity PointGravPos Position of point gravity PlaneGravDir Direction of plane gravity GroundSlope Slope of the ground (Y- plane) WaveForceFre Frequency of wave forcing WaveForceMin Amplitude of wave forcing from X- plane WaveForceMax Amplitude of wave forcing from X+ plane Name Name of scene example Num Number of particles to simulate VolMin Start corner of Domain Volume VolMax End corner of Domain Volume InitMin Start corner of Initial Particle placement InitMax End corner of Initial Particle placement

Fluids-Zlib License

FLUIDS v.3 - SPH Fluid Simulator for CPU and GPU Copyright (C) 2012. Rama Hoetzlein, http://fluids3.com

• NOTE: Acknowledgement of the original author is required in professional papers or software products as: 2012 Hoetzlein, Rama. Fluids v.3 - A Large-Scale, Open Source Fluid Simulator. Published online at: fluids3.com. December 2012. (See part 1 below)

  Fluids-ZLib license This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. Acknowledgement of the original author is required if you publish this in a paper, or use it in a product. (See fluids3.com for details)
  2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.