Monday, July 21, 2014

Hanley Innovations initiates Just-In-Time Pricing for CFD

Hanley Innovations initiates Just-In-Time Pricing for CFD with $295 per month for Stallion 3D with HIST.


Invariably, pricing-out engineering software for a project becomes a distressing scenario. Concrete conditions on lengths of lease times for software packages are frequently either too long or too short for particular projects. Compounding the issue is the task of piecing together separate integrated software packages and the inescapable hours and days of wrangling grids and points onto a surface.

In response, Hanley Innovations has initiated Just-In-Time Pricing for CFD to further our commitment to facilitate a company’s or school’s lean manufacturing practices. Stallion 3D contains the novel algorithm HIST (Hanley Innovations Surface Treatment) which reduces your workflow to seconds. The program features fully automatic invisible gridding and Navier-Stokes and Euler solvers that handles viscous flows on complex arbitrary geometries on your laptop.

Stallion 3D effortlessly handles a CAD file size of 100,000 facets on a 64-bit computer. In ONE day with Stallion 3D with HIST, you will be able to purchase, set-up, and get a full 2.5 million analysis run. Full technical support is offered throughout the entire time of your lease
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About Stallion 3D
Stallion 3D with HIST is a fully automatic, All-In-One, software package for analyzing 3D complex geometries in fluid flows (gas or liquid). The software allows you to perform aerodynamics analysis on just your laptop or desktop computer. It employs a novel computational fluid dynamics (CFD) technique HIST that solves the fluid equations and produces plots of pressure, velocity, Mach number and temperature. The software also computes the lift, drag moments and related forces acting on your 3D CAD geometry.

More information about Stallion 3D can be found at http://www.hanleyinnovations.com/stallion3d.html or by calling (352) 240-3658.

Monday, July 7, 2014

What is Stallion 3D with HIST - exactly?

What is Stallion 3D with HIST?
Stallion 3D is a fully automatic, All-In-One, software package for analyzing 3D complex geometries in  fluid flows (gas or liquid).  The software allows you to perform aerodynamics analysis  on just your laptop or desktop computer.  It employs a novel computational fluid dynamics (CFD) technique that solves the fluid equations and produces plots of pressure, velocity, Mach number and temperature. The software also computes the lift, drag moments and related forces acting on your 3D CAD geometry.

Analysis of Porsche using Stallion 3D. CAD file obtained from grabcad.com

What is HIST?
HIST is the acronym for Hanley Innovations Boundary Treatment. It is a propriety CFD technique that applies the flow boundary conditions to arbitrary geometries immersed in a Cartesian Grid. HIST can handle both inviscid and viscous (no-slip) boundary conditions.  It can be used to solve subsonic, transonic and supersonic flow problems.

Stallion 3D Solution of Laminar Flow over a Tapered Wing.

Why is the program referred to as an “All-In-One”?
Stallion 3D does not require the purchase of additional software for pre- and post processing. . It handles everything from reading in a CAD model to graphing and tabulating the results of your aerodynamics/CFD analysis.

Is HIST similar to other grandfather or newer CFD solvers on the market freeware?
The HIST solver is entirely new and robust enough to capture shock waves and analyze viscous flows.

Is Stallion 3D with HIST,  an interface software,  to use with pre-existing Cartesian software program?
It is not an interface program. It is an All-in-One aerodynamics & CFD program for analyzing CAD geometries in a flow field.


How long does it take for someone to setup a problem for analysis in Stallion 3D? 
Setting-up,  literally, takes.... just seconds. 


Do I have to mesh a grid at any time?
Stallion 3D specifically eliminates the need for our customers to grid because of HIST, our invisible meshing feature.

Do I need to purchase a pre-processor or mesh generating software for  Stallion 3D?
No. Grid generation is built into Stallion 3D.

Do I need to purchase a separate solver to analyze the geometry?
No. It is built-in already in Stallion 3D. Stallion 3D is equipped with algorithms to solve the full 3D compressible Euler & Navier-Stokes equations.  The analysis is valid for low and high speed flows of liquids and gasses.

Laminar flow analysis over a golf ball using Stallion 3D.

Do I need to purchase post processing or separate graphic package to see the graphics after the simulation is finished?
No.  It is built-in already in Stallion 3D.

What are the workflow steps for Stallion 3D? 
1. Insert watertight CAD picture. (takes just a few seconds)
2. Add your parameters (Flow speed, angle of attack, ground effect or rotation  take just a few moments to specify in Stallion 3D.)
3. Stallion 3D will fully and accurately mesh and set-up your grid and begin the analysis.
4. Once the flow is analyzed, the program will automatically have your results ready for you to view or save.

Analysis of rotor blade (also from grabcad.com) with quasi-steady rotation. Stallion 3D 
performs gridding, computations and post processing for complex 3D geometries.

Hardware Requirements?
Laptop running the 64 bit version of Windows XP, 7 or 8 (8.1).

Does the program use a cloud to run simulations?
We do not use a cloud for running simulations. You can do all of your work on your laptop.

What is the general maximum number of cells that can be run for a Windows  simulation?
2.5 million cells.

What are the current prices for Stalllion 3D with HIST as of July 2014?
Please visit http://www.hanleyinnovations.com/stallion3d.html for current prices.

How soon do I receive the Stallion 3D after ordering?
The same day.  Please call us at (352) 240-3658 or visit http://www.hanleyinnovations.com to place your orders.

If I purchase the popular 3 month lease subscription, can I apply what paid for the 3 month lease to a 12 month lease?
You can upgrade to  a 12 month lease, with the 3 month credit.

More information about Stallion 3D can be found at http://www.hanleyinnovations.com/stallion3d.html

Thanks for reading.

Saturday, June 28, 2014

An Overview of CFD Vision Goals for 2030

But....really...why wait?

Five CFD 2030 Wish-List Ideas Currently Available at Hanley Innovations

Wish 1.) A Revolutionary Algorithm. 
It is universally agreed, that a new algorithm is essential to handle the increasing complexity of geometries presented for analysis in today's engineering arena.

Hanley Innovations Surface Treatment (HIST) is the propriety algorithm developed to respond to the uncompromising demands of your research.

Analysis of the DLR F11 High Lift Configuration on a HP Pavilion dv6

With HIST powering Stallion 3D, you can perform serious external CFD on your laptop at work or home.

HIST handles complex CAD geometries, subsonic, transonic and supersonic regimes and viscous (no-slip) boundary conditions.

Wish 2.)  Seamless Integration.
Today's standard CFD workflow process for analyzing an object requires expert juggling of several different software packages. Stallion 3D with HIST is seamless and is the only 3D program that completely sets-up... in seconds.

Stallion 3D with HIST eliminates the need for you to learn how to mesh and overlay grids, pay for extra software, and spend days in training just to get your work completed on time.

Wish 3.) Invisible Meshing
Everyone understands why CFDers need invisible meshing in their CFD program.

Stallion 3D's invisible meshing capabilities, affords the CFD community the opportunity to focus on other aspects of their workload and research, rather than taking hours and subsequent days setting-up a CAD geometry.

Stallion 3D Cartesian Grid at a Station Along the Span of the DLR F11 

Stallion 3D with HIST is genuinely invisible, and most importantly, our results correspond to validation wind tunnel testing runs from NASA, so there is no stress in wondering about the accuracy of your results derived from our program.
Undoubtedly, Stallion 3D is the easiest CFD program on the market.

You never again have to overlay additional grid shapes, add points, subtract areas, build-up bumps, eye-ball, or cross your fingers to increase accuracy when generating your mesh.

 Wish 4.) High Powered Computers
Admittedly, all the mention of future computing hardware possibilities, mentioned in the 2030 AIAA presentation was enough to make anyone drool.

Today, though our children may not be impressed with computers, us over 50 years old, personally know how far hardware has progressed beautifully .

Stallion 3D with HIST  allows you to do serious calculations on your laptop. An average set-up of 2 million cells can be completely loaded into the program

Wish 5.) Organized Data Collection
Once your simulation has finished your simulation, all the pertinent results are automatically tabulated for you.

References

1. Slotnick,Jeffrey, et. al., "CFD Vision 2030 Study: A Path to Revolutionary Computational Aerosciences",  http://ntrs.nasa.gov/search.jsp?R=20140003093

2. 2nd AIAA CFD High Lift Prediction Workshop, http://hiliftpw.larc.nasa.gov/

3. 3D CFD simulation performed using Stallion 3D. Please visit http://www.hanleyinnovations.com/stallion3d.html. Prices start at $890.

More Information

Please visit http://www.hanleyinnovations.com or telephone (352) 240-3658 for more information.
Thanks for reading.

Sunday, April 27, 2014

Supersonic Aerodynamics

Years ago, the X-15 was an experimental aircraft for testing futuristic supersonic and hypersonic space plane concepts such as the space shuttle orbiter.

I used Stallion 3D to do a quick comparison of an X-15 CAD model at  two flight Mach numbers, M=3.5 and M=6.0.  The model of the X-15 was taken from NASA OpenVSP hanger.  The results are shown below:

    X-15:  In the top picture M=3.5.  The Mach number is 6.0 in the picture at the bottom.

The following link has a very interesting article on the X-15 aerodynamics:  http://history.nasa.gov/SP-60/ch-5.html.  If you are interested in developing airplane concepts, NASA OpenVSP is a good option.  More information can be found at http://www.openvsp.org.

The .stl output of OpenVSP can be read directly in Stallion 3D for rapid aerodynamics analysis (no external grid generation).  More information can be found at http://www.hanleyinnovations.com.

Do not hesitate to email or telephone me at (352) 240-3658 if you have any questions. Thanks for reading.

Wednesday, December 11, 2013

Through 180-Degree Angle of Attack

Following the 1981 paper,  "Aerodynamic Characteristics of Seven Symmetrical Airfoil Sections Through 180 Degree Angle of Attack for Use in Aerodynamic Analysis of Vertical Axis Wind Turbines", Sand80, by Robert E. Sheldahl, et. al., I analyzed the NACA 0012 in MultiElement Airfoils at various angles past stall.

The following picture shows the results of the analysis superimposed on a graphs from the Sandia study.

Analysis of a NACA 0012 airfoil through 180 degrees angle of attack.
The blue dots are the Navier-Stokes solution in MultiElement Airfoils.
  The red Xs are the potentialflow/boundary layer solution.

For the analysis, I used the laminar Navier-Stokes solution setting in MultiElement Airfoils.  The software is based on a Cartesian grid methods (ghost cell approach for the boundary conditions) and has a variety of flow solvers.   The following picture shows the flow at 5 degrees angle of attack.

Analysis of NACA 0012 in MultiElement Airfoils 5.1

More information about MultiElement Airfoils can be found at http://www.hanleyinnovations.com/mefoil.html

Thanks for reading.

Thursday, November 28, 2013

5 Things you can do with a Cartesian grid.

Cartesian grids are very easy to draw. They are quite straight-forward and quick to construct.  Here are five things that one can do with a Cartesian grid.

1. Tic Tac Toe
Are you on a long airplane trip.  Need a quick game? 
Tic Tac Toe grid from Optometry Student website


Of course there are more complex Cartesian grid games such as checkers and chess.

2. Graphs
If you need to quickly display data, then this is the old-school way to do it.  Plot the points and connect the dots.

 
3. Construction and Flooring
Just think about it.  How long would it take to tile your floors if you could not just do this (see pic).

Graph from Wikipedia

4. Mosaics
A form of rasterisation, mosaics can be used to represent pictures of people, objects and places. 
Mosaic of Bob Marley from Art-Heist
 
Digital cameras also use rasterisation to take quick pictures of events, vacation and family gatherings. Leonardo da Vinci would argue that there are better ways of painting pictures. 
 
5. Aerodynamics
Cartesian grids can be used to quickly obtain aerodynamics results for 2-D and 3-D problems if you can solve the boundary problems (without using cut-cells).

Computations using MultiElement Airfoils and Stallion 3D.
 
Fortunately, if you visit http://www.hanleyinnovations.com, you can find the software to easily determine the workings of you CAD creations.

Thanks for reading.

Friday, September 6, 2013

If You Like Jets and Aerodynamics ...

If you like jets, aerodynamics and have a CFD program, you might find yourself doing this:

Yesterday, I visited the NASA OpenVSP Hangar website and saw a model of the Lockheed L-1011.  Because I like the L-1011, I decided to analyze it in Stallion 3D in ground effect  .... (Why not?)

This is how the model loaded in my copy of OpenVSP:

 
 
This is the window that I used  to import the .STL file of the model into Stallion 3D using the Design menu and the Import/Edit .STL file option:


This is a wireframe of the model after it loaded into Stallion 3D.  I set the ground plane option because I wanted to simulate takeoff:

 
 I used the following window to set the resolution of the Cartesian grid in Stallion 3D.  The initial grid in (x,y,z) sub-divisions is (6X2X6):


I opted to use the compressible Euler code for the analysis:


I used the following window to set the ground effect option in the analysis:


After choosing a speed of 100 m/s and a rotation angle of 5 degrees, I clicked the CFD Solver menu and choose Generate Grid/Solve Flow to automatically generate the grid and solve the flow.  I then walked away from my laptop.


I generated this picture (the colors show surface pressure) of the airplane and the ground plane after I returned to the laptop (about 8 hours later):


I rotated the view, changed the display to surface velocity and generated this picture of the aircraft and the ground plane (the colors show velocity):


I thought this picture of the tip airfoil might be interesting.  I also generated the pressure coefficient (Cp) at various stations along the  wing using the Graphs menu and the Pressure Coefficient (Cp) option in Stallion 3D (the colors show pressure).


Granted the OpenVSP model of the L-1011 is not the one sold by Lockheed (airfoils?, plain flaps during takeoff? exposed duct?, etc...), it is still fun to look at the numbers.   The model that I ran measured about 180 feet in length and had a width (wing span) of about 150 feet.

Rotated at 5 degrees during takeoff, here are a few calculations of the lift:
@ 100 mph  --- Lift = 110,000 pounds
@ 150 mph  --- Lift = 245,000 pounds
@ 200 mph  --- Lift = 435,000 pounds
@ 250 mph  --- Lift = 680,000 pounds

Note (mph) is miles per hour.  It will be a good exercise for the reader (I did it myself) to google the performance of the various models of the L-1011 for comparison.

More information about Stallion 3D can be found at http://www.hanleyinnovations.com/stallion3d.html.

Thanks for reading.