2022.2

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AcuSolve Validation Manual
Collection of AcuSolve simulation cases for which results are compared against analytical or experimental results to demonstrate the accuracy of AcuSolve results.
Turbulent Flow
This section includes validation cases containing flow conditions that will cause turbulence to form, requiring that a turbulence model is used.

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AcuSolve Training Manual
AcuSolve Validation Manual
AcuSolve Command Reference Manual
AcuSolve Programs Reference Manual
AcuSolve User-Defined Functions Manual
AcuTrace Command Reference Manual
AcuTrace User-Defined Functions Manual
AcuReport Reference Manual
AcuSolve Surface Processing

2022.2

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View new features for AcuSolve 2022.2.
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AcuSolve is a leading general purpose CFD solver that is capable of solving the most demanding industrial and scientific applications.
Tutorials
Discover AcuSolve functionality with interactive tutorials.
AcuSolve Training Manual
Introduction of background knowledge regarding flow physics and CFD as well as detailed information about the use of AcuSolve and what specific options do.
AcuSolve Validation Manual
Collection of AcuSolve simulation cases for which results are compared against analytical or experimental results to demonstrate the accuracy of AcuSolve results.
- Turbulent Flow
  This section includes validation cases containing flow conditions that will cause turbulence to form, requiring that a turbulence model is used.
  - Single-Phase Nucleate Boiling in a Rectangular Channel
    In this application, AcuSolve is used to simulate the wall heat flux due to nucleate boiling at a heated wall inside a rectangular channel with water flow. Results are compared with experimental heat flux measurements as reported by Steiner, et al. (2005). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model single phase nucleate boiling problems.
  - Turbulent Flow Through a Pipe
    In this application, turbulent flow of air through a pipe is simulated. AcuSolve results are compared with experimental results as described in White (1991) and extracted from the Moody chart. The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model turbulent flow within pipes.
  - Turbulent Flow Behind an Open-Slit V
    In this application, AcuSolve is used to simulate turbulent flow of air through and behind a two dimensional open-slit V. AcuSolve results are compared with experimental results adapted from Yang and Tsai (1993). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model the Coandă effect.
  - Turbulent Flow with Separation in an Asymmetric Diffuser
    In this application, AcuSolve is used to simulate fully developed turbulent flow through an asymmetric diffuser with a divergent lower wall and a straight upper wall. AcuSolve results are compared with experimental results as described in Buice and Eaton (2000). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model cases with internal turbulent flow with flow separation and reattachment in an asymmetric diffuser.
  - Turbulent Flow Over a Backward-Facing Step
    In this application, AcuSolve is used to simulate fully developed turbulent flow over a backward-facing step. AcuSolve results are compared with experimental results as described in Driver (1985) and on the NASA Langley Research Center Turbulence Modeling Resource web page. The close agreement of AcuSolve results with experimental data and reference turbulence model performance validates the ability of AcuSolve to model cases with turbulent flow that forms a shear layer, recirculates and then reattaches downstream of the divergent step.
  - Turbulent Flow with Separation in an Axisymmetric Diffuser
    In this application, AcuSolve is used to simulate fully developed turbulent flow through an axisymmetric diffuser with a divergent upper wall and a straight lower wall. AcuSolve results are compared with experimental results as described in Driver (1991) and on the NASA Langley Research Center Turbulence Modeling Resource webpage. The close agreement of AcuSolve results with experimental data and reference turbulence model performance validates the ability of AcuSolve to model cases with turbulent flow with separation due to an adverse pressure gradient within an axisymmetric geometry.
  - Turbulent Flow Past a Convex Curve in a Channel
    In this application, AcuSolve is used to simulate fully developed turbulent flow through a channel containing a convex curve in the lower wall. AcuSolve results are compared with experimental results as described in Smits (1979) and on the NASA Langley Research Center Turbulence Modeling Resource webpage. The close agreement of AcuSolve results with experimental data and reference turbulence model performance validates the ability of AcuSolve to model cases with turbulent flow moving past a convex curved wall.
  - Turbulent Natural Convection Inside a Tall Cavity
    In this application, AcuSolve is used to simulate the natural convection of a turbulent flow field within a tall rectangular cavity. AcuSolve results are compared with experimental results as described in Betts and Bokhari (2000). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model cases with natural convection of turbulent flow within a tall cavity.
  - Turbulent Flow Over a NACA 0012 Airfoil
    In this application, AcuSolve is used to simulate turbulent flow of a fluid over a NACA 0012 airfoil at 3 angles of attack, 0 degrees, 10 degrees, and 15 degrees. AcuSolve results are compared with experimental results for coefficients of pressure, lift, and drag reported by NASA. The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model external aerodynamics.
  - Turbulent Flow Through a 180 Degree Curved Channel
    In this application, AcuSolve is used to simulate turbulent flow through a strongly curved two dimensional 180 degree U-duct channel. AcuSolve results are compared with experimental results adapted from Rumsey et al. (2000). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model turbulent cases with strong curvature effects.
  - Turbulent Flow Through a Wavy Channel
    In this application, AcuSolve is used to simulate turbulent flow through a channel with a lower wall shaped as a sinusoidal wave. AcuSolve results are compared with experimental results adapted from Kuzan (1986). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model cases with internal flow through a channel with wavy walls.
  - Turbulent Flow Through a Heated Periodic Channel
    In this application, AcuSolve is used to solve for the flow and temperature field within a channel containing a heated wall. The wall is maintained at a constant temperature, inducing heat flux into the fluid, to predict the thermal law of the wall. The non-dimensional temperature versus the non-dimensional height above the wall is compared to the analytical correlation provided by Kader.
  - Turbulent Mixing Layers in an Open Channel
    In this application, AcuSolve is used to simulate the mixing of two streams of fluid with different velocities moving past a splitter plate. AcuSolve results are compared with experimental results as described in J. Delville, et al. (1989). The close agreement of AcuSolve results with the experimental results validates the ability of AcuSolve to model mixing layers in the turbulent flow regime.
  - Two-Phase Nucleate Boiling in a Cylindrical Pipe
    In this application, AcuSolve is used to simulate the changes in wall temperature due to two-phase nucleate boiling at the heated walls of a pipe with water flowing through it. AcuSolve results are compared with experimental results adapted from Koncar and others (2015). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model two-phase nucleate boiling problems.
  - Supersonic Flow Through a Converging-Diverging Nozzle
    In this application, AcuSolve is used to simulate the high-speed turbulent flow in a converging and then diverging nozzle. The flow within the nozzle enters as subsonic, reaches sonic at the throat and shortly after develops a normal shock. AcuSolve results are compared with experimental results adapted from Bogar and Sajben (1983). The close agreement of AcuSolve results to experimental measurements validates the ability of AcuSolve to simulate internal supersonic flows where normal shocks are present.
  - Turbulent Flow Past a Wall-Mounted Hump
    In this application, AcuSolve is used to simulate fully developed turbulent flow past a smooth hump on the lower wall of a flow domain. AcuSolve results are compared with experimental results as described in Seifert and Pack (2002) and on the NASA Langley Research Center Turbulence Modeling Resource web page. The close agreement of AcuSolve results with experimental data and reference turbulence model performance validates the ability of AcuSolve to model cases with turbulent flow moving past a wall protrusion resulting in flow separation and recovery.
  - Turbulent Flow Over an Oscillating Rigid Body Assembly
    In this application, AcuSolve is used to simulate the fluid-structure interaction of a fluid moving over a cylinder/plate assembly. AcuSolve results are compared with experimental results as described in Gomes and Lienhart (2009). The close agreement of AcuSolve results with the experimental results validates the ability of AcuSolve to model cases in which the fluid forces lead to structural motions.
- Steady Flow
  This section includes validation cases that consider steady state flow simulations.
- Laminar Flow
  This section includes validation cases that do not require a turbulence model to be used.
- Internal Flow
  This section includes validation cases that consider wall bounded simulation domains with internally constrained fluid medium.
- External Flow
  This section includes validation cases that consider unbounded simulation domains where external flow is present over solid bodies, leading to free boundary layer development.
- Transitional Flow
  This section includes validation cases containing conditions producing laminar to turbulent flow that are simulated with a turbulence transition model.
- Transient Flow
  This section includes validation cases that consider time dependent flow simulations.
- Heat Transfer/Radiation
  This section includes validation cases that consider the temperature of the flow by simulating one or modes of heat transfer.
- Moving Mesh
  This section includes validation cases that consider time dependent motion within the domain, requiring that the mesh movement be modeled with a differential equation, a fully defined mesh motion or by interpolated mesh motion.
- Reference Frame
  This section includes validation cases that consider multiple reference frame simulations to model the effects of simplified rotational motion.
- Multiphase
  This section includes validation cases that consider the immiscible multiphase interaction of two fluids.
- Compressible
  This section includes validation cases that consider the compressibility of the fluid using a variable material model.
AcuSolve Command Reference Manual
AcuSolve command descriptions and corresponding examples.
AcuSolve Programs Reference Manual
AcuSolve utility programs covering preparatory and post-processing as well as user-defined functions and utility scripts.
AcuSolve User-Defined Functions Manual
Customization of AcuSolve allowing you to customize certain capabilities of the solver.
AcuTrace Command Reference Manual
Commands of AcuTrace, a particle tracer that runs as a post-processor to or a co-processor with AcuSolve.
AcuTrace User-Defined Functions Manual
Instructions to define additional solution quantities of AcuTrace called user equations.
AcuReport Reference Manual
Instruction of the AcuReport tool, a standalone post-processor batch tool used to generate a report from an AcuSolve solution database.
AcuSolve Surface Processing

View All Altair Simulation Help

2022.2

Home
AcuSolve Validation Manual
Collection of AcuSolve simulation cases for which results are compared against analytical or experimental results to demonstrate the accuracy of AcuSolve results.
Turbulent Flow
This section includes validation cases containing flow conditions that will cause turbulence to form, requiring that a turbulence model is used.

What's New
Get Started
Tutorials
AcuSolve Training Manual
AcuSolve Validation Manual
AcuSolve Command Reference Manual
AcuSolve Programs Reference Manual
AcuSolve User-Defined Functions Manual
AcuTrace Command Reference Manual
AcuTrace User-Defined Functions Manual
AcuReport Reference Manual
AcuSolve Surface Processing

Turbulent Flow

This section includes validation cases containing flow conditions that will cause turbulence to form, requiring that a turbulence model is used.

Single-Phase Nucleate Boiling in a Rectangular Channel
In this application, AcuSolve is used to simulate the wall heat flux due to nucleate boiling at a heated wall inside a rectangular channel with water flow. Results are compared with experimental heat flux measurements as reported by Steiner, et al. (2005). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model single phase nucleate boiling problems.
Turbulent Flow Through a Pipe
In this application, turbulent flow of air through a pipe is simulated. AcuSolve results are compared with experimental results as described in White (1991) and extracted from the Moody chart. The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model turbulent flow within pipes.
Turbulent Flow Behind an Open-Slit V
In this application, AcuSolve is used to simulate turbulent flow of air through and behind a two dimensional open-slit V. AcuSolve results are compared with experimental results adapted from Yang and Tsai (1993). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model the Coandă effect.
Turbulent Flow with Separation in an Asymmetric Diffuser
In this application, AcuSolve is used to simulate fully developed turbulent flow through an asymmetric diffuser with a divergent lower wall and a straight upper wall. AcuSolve results are compared with experimental results as described in Buice and Eaton (2000). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model cases with internal turbulent flow with flow separation and reattachment in an asymmetric diffuser.
Turbulent Flow Over a Backward-Facing Step
In this application, AcuSolve is used to simulate fully developed turbulent flow over a backward-facing step. AcuSolve results are compared with experimental results as described in Driver (1985) and on the NASA Langley Research Center Turbulence Modeling Resource web page. The close agreement of AcuSolve results with experimental data and reference turbulence model performance validates the ability of AcuSolve to model cases with turbulent flow that forms a shear layer, recirculates and then reattaches downstream of the divergent step.
Turbulent Flow with Separation in an Axisymmetric Diffuser
In this application, AcuSolve is used to simulate fully developed turbulent flow through an axisymmetric diffuser with a divergent upper wall and a straight lower wall. AcuSolve results are compared with experimental results as described in Driver (1991) and on the NASA Langley Research Center Turbulence Modeling Resource webpage. The close agreement of AcuSolve results with experimental data and reference turbulence model performance validates the ability of AcuSolve to model cases with turbulent flow with separation due to an adverse pressure gradient within an axisymmetric geometry.
Turbulent Flow Past a Convex Curve in a Channel
In this application, AcuSolve is used to simulate fully developed turbulent flow through a channel containing a convex curve in the lower wall. AcuSolve results are compared with experimental results as described in Smits (1979) and on the NASA Langley Research Center Turbulence Modeling Resource webpage. The close agreement of AcuSolve results with experimental data and reference turbulence model performance validates the ability of AcuSolve to model cases with turbulent flow moving past a convex curved wall.
Turbulent Natural Convection Inside a Tall Cavity
In this application, AcuSolve is used to simulate the natural convection of a turbulent flow field within a tall rectangular cavity. AcuSolve results are compared with experimental results as described in Betts and Bokhari (2000). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model cases with natural convection of turbulent flow within a tall cavity.
Turbulent Flow Over a NACA 0012 Airfoil
In this application, AcuSolve is used to simulate turbulent flow of a fluid over a NACA 0012 airfoil at 3 angles of attack, 0 degrees, 10 degrees, and 15 degrees. AcuSolve results are compared with experimental results for coefficients of pressure, lift, and drag reported by NASA. The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model external aerodynamics.
Turbulent Flow Through a 180 Degree Curved Channel
In this application, AcuSolve is used to simulate turbulent flow through a strongly curved two dimensional 180 degree U-duct channel. AcuSolve results are compared with experimental results adapted from Rumsey et al. (2000). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model turbulent cases with strong curvature effects.
Turbulent Flow Through a Wavy Channel
In this application, AcuSolve is used to simulate turbulent flow through a channel with a lower wall shaped as a sinusoidal wave. AcuSolve results are compared with experimental results adapted from Kuzan (1986). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model cases with internal flow through a channel with wavy walls.
Turbulent Flow Through a Heated Periodic Channel
In this application, AcuSolve is used to solve for the flow and temperature field within a channel containing a heated wall. The wall is maintained at a constant temperature, inducing heat flux into the fluid, to predict the thermal law of the wall. The non-dimensional temperature versus the non-dimensional height above the wall is compared to the analytical correlation provided by Kader.
Turbulent Mixing Layers in an Open Channel
In this application, AcuSolve is used to simulate the mixing of two streams of fluid with different velocities moving past a splitter plate. AcuSolve results are compared with experimental results as described in J. Delville, et al. (1989). The close agreement of AcuSolve results with the experimental results validates the ability of AcuSolve to model mixing layers in the turbulent flow regime.
Two-Phase Nucleate Boiling in a Cylindrical Pipe
In this application, AcuSolve is used to simulate the changes in wall temperature due to two-phase nucleate boiling at the heated walls of a pipe with water flowing through it. AcuSolve results are compared with experimental results adapted from Koncar and others (2015). The close agreement of AcuSolve results with experimental results validates the ability of AcuSolve to model two-phase nucleate boiling problems.
Supersonic Flow Through a Converging-Diverging Nozzle
In this application, AcuSolve is used to simulate the high-speed turbulent flow in a converging and then diverging nozzle. The flow within the nozzle enters as subsonic, reaches sonic at the throat and shortly after develops a normal shock. AcuSolve results are compared with experimental results adapted from Bogar and Sajben (1983). The close agreement of AcuSolve results to experimental measurements validates the ability of AcuSolve to simulate internal supersonic flows where normal shocks are present.
Turbulent Flow Past a Wall-Mounted Hump
In this application, AcuSolve is used to simulate fully developed turbulent flow past a smooth hump on the lower wall of a flow domain. AcuSolve results are compared with experimental results as described in Seifert and Pack (2002) and on the NASA Langley Research Center Turbulence Modeling Resource web page. The close agreement of AcuSolve results with experimental data and reference turbulence model performance validates the ability of AcuSolve to model cases with turbulent flow moving past a wall protrusion resulting in flow separation and recovery.
Turbulent Flow Over an Oscillating Rigid Body Assembly
In this application, AcuSolve is used to simulate the fluid-structure interaction of a fluid moving over a cylinder/plate assembly. AcuSolve results are compared with experimental results as described in Gomes and Lienhart (2009). The close agreement of AcuSolve results with the experimental results validates the ability of AcuSolve to model cases in which the fluid forces lead to structural motions.

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