Company
Portfolio Data
Back to Company SearchCOMPUTATIONAL SCIENCES LLC
UEI: PYVAK1B5N7W4
Number of Employees: 6
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
SBIR/STTR Involvement
Year of first award: 2007
7
Phase I Awards
4
Phase II Awards
57.14%
Conversion Rate
$753,889
Phase I Dollars
$2,979,222
Phase II Dollars
$3,733,111
Total Awarded
Awards
Improved Turbulence Modelling Across Disparate Length Scales for Naval Computational Fluid Dynamics Applications
Amount: $84,779 Topic: N15A-T002
Computational Sciences LLC will collaborate with the Rensselaer Polytechnic Institute (RPI) to develop and validate a stand-alone computational module that naturally accounts for the effects of turbulence. Such fluctuations and transitions may be associated with compressible flows and boundary layer interactions. The module will be designed for implementation in to existing legacy codes for use in characterization of unsteady vorticity-dominated flows.The approach is based on a novel, regularized set of Navier-Stokes equations (RNS) that is extended to account for turbulence effects (fluctuations) in the continuum approximation. RNS has several important features not found in classical NS equations that are of direct relevance turbulent flows: (a) Kolmogorov-scale field fluctuations resulting from a mathematical model that accounts for turbulent diffusion in a natural manner that allows direct simulation of phenomena such as laminar-turbulence transition and wall slip effects; and (b) Natural accounting of growth of small-scale turbulent structures without refining down to Kolmogorovs scale.Phase I will focus on a simplified 3D working version of the approach by removing the selected restrictions. The validation of the model will be provided by comparison of the simulation results with the experimental data for a set of representative turbulent flows. The software module will be connected to a high order compressible flow code and will be exercised and evaluated against experimental data for selected model problems that contain elements of both nearfield and farfield wakes. Phase II will refine the approach to include generalized vortical flows generated by 6 degree-of-freedom hard body interactions, and will validate it on problems of interest to the Navy.
Tagged as:
STTR
Phase I
2015
DOD
NAVY
A universal framework for non-deteriorating time-domain numerical algorithms in Maxwell's electrodynamics
Amount: $999,893 Topic: A13A-T008
The project will remove a key difficulty that currently hampers many existing methods for computing unsteady electromagnetic waves on unbounded regions. Numerical accuracy and/or stability may deteriorate over long times due to the treatment of artificial outer boundaries. We propose to develop a universal algorithm and software that will correct this problem by employing the Huygens' principle and lacunae of Maxwell's equations. The algorithm will provide a temporally uniform guaranteed error bound (no deterioration at all), and the software will enable robust electromagnetic simulations in a high-performance computing environment. The methodology will apply to any geometry, any scheme, and any boundary condition. It will eliminate the long-time deterioration regardless of its origin and how it manifests itself. Dr. Tsynkov who co-invented this method is the Academic partner on the project. Phase I included development of an innovative numerical methodology for high fidelity error-controlled modeling of a broad variety of electromagnetic and other wave phenomena. Proof-of-concept 3D computations have been conducted that convincingly demonstrate the feasibility and efficiency of the proposed approach. In Phase II our algorithms will be implemented as robust commercial software tools in a standalone module that can be combined with existing numerical schemes in computational electromagnetic codes.
Tagged as:
STTR
Phase II
2014
DOD
ARMY
A universal framework for non-deteriorating time-domain numerical algorithms in Maxwell's electrodynamics
Amount: $149,946 Topic: A13A-T008
The project will remove a key difficulty that currently hampers many existing methods for computing unsteady electromagnetic waves on unbounded regions. Numerical accuracy and/or stability may deteriorate over long times due to the treatment of artificial outer boundaries. We propose to develop a universal algorithm and software that will correct this problem by employing the Huygens'principle and quasi-lacunae of Maxwell's equations. The algorithm will provide a guaranteed error bound, uniform in time (no deterioration at all), and the software will enable robust electromagnetic simulations in a high-performance computing environment. The methodology will apply to any geometry, any scheme, and any boundary condition. It will eliminate the long-time deterioration regardless of its origin and how it manifests itself. Dr. Tsynkov who co-invented this method is the Academic partner on the project. Phase I includes development of an innovative numerical methodology for high fidelity error-controlled modeling of a broad variety of electromagnetic and other wave phenomena. Proof-of-concept 3D computations will be conducted and verified against benchmarks, to demonstrate efficiency of the proposed approach. In Phase II our algorithms will be implemented as robust commercial software tools in a standalone module that can be combined with existing numerical schemes in computational electromagnetic codes.
Tagged as:
STTR
Phase I
2013
DOD
ARMY
A Priori Error-Controlled Simulations of Electromagnetic Phenomena for HPC
Amount: $99,957 Topic: A11a-T015
The project will remove a key difficulty that currently hampers many existing methods for computing unsteady electromagnetic waves in unbounded regions. The accuracy and/or stability of the simulations may deteriorate over long times due to the treatment of the outer boundaries via artificial boundary conditions. We propose to develop a universal algorithm and software that will correct this problem by employing the Huygens"principle and quasi-lacunae in the solutions of Maxwell"s equations. The algorithm will provide a temporally uniform guaranteed error bound (no deterioration at all), and the software will enable robust electromagnetic simulations in a high-performance computing environment. The methodology will apply to any geometry, any numerical scheme and any treatment of outer boundaries. It will eliminate the long-time deterioration regardless of both its origin and the way it manifests itself. Dr. Tsynkov of NCSU, who invented this method and is referenced in the Solicitation, is the Academic partner on the project. Phase I includes development of an innovative numerical methodology for high fidelity error-controlled modeling of a broad variety of electromagnetic and other wave-dominated phenomena. Solutions to test problems will be verified against analytical and accurate numerical benchmarks, to demonstrate the feasibility of the proposed approach. In Phase II our innovative algorithms will be implemented as robust commercial software tools in a standalone computational module that can be used to fix existing numerical schemes, along with the treatment of the outer boundaries, in computational electromagnetic codes.
Tagged as:
STTR
Phase I
2011
DOD
ARMY
Unified Methodology for Simulation of Continuum and Rarefied Flows
Amount: $499,833 Topic: MDA08-034
We propose to develop stand-alone computational modules for seamlessly extending the validity of continuum CFD codes into transitional and rarefied flow regimes. The modules will be designed for implementation in to existing legacy codes for use in the characterization of high altitude plume flows. The approach is based on a novel, regularized set of Navier-Stokes equations (RNS) that is extended to account for kinetic effects (intermediate Knudsen number, fluctuations) in the continuum approximation. RNS has several important features not found in classical NS equations that are of direct relevance in high altitude plume flows: (a) Natural accounting of both continuum and rarefied gas flow regimes; and (b) Kolmogorov-scale field fluctuations resulting from a mathematical model that accounts for turbulent diffusion in a natural manner that allows direct simulation of phenomena such as laminar-turbulent transition and wall slip effects. Phase I has completed the development of stand-alone, computational module prototypes incorporating a simplified version of the RNS approach. The modules were connected to a characteristics-based high order compressible flow code with particle transport capabilities, and an unstructured finite-element code, and were successfully exercised and evaluated for a model problem that contained features of both continuum and rarefied flows. Phase II will complete the development of the modules, provide a detailed comparison to Navier-Stokes results for low and high altitude flow regimes, identify the parameter region where the approach is advised, and provide connections to plume signatures sponsored and managed by the MDA/DES modeling and simulation effort.
Tagged as:
SBIR
Phase II
2010
DOD
MDA
Model-Free Control System for Scramjet Applications
Amount: $99,988 Topic: AF083-121
Flow fluctuations in the flame-holder cavity affect its stable operation that can lead to degradation of its performance. Efficient cavity operations can be enhanced through active control of injection of air and fuel mixtures. We propose to design and validate a novel Model-Free Direct (feedback) Control system to ensure stable cavity operation in the subsonic regime with smooth transitions to supersonic combustion. We will focus on a model-free strategy interacting with sensor and actuator arrays. Control system design and prototyping will be done with the aid of an existing simulation environment that connects flow solvers acting as plant emulators to control software. This approach will allow full accounting of the interaction of sensor-controller-actuator-flow dynamics in an active flow control loop. Phase I will focus sensor-controller-actuator model preparation, design of numerical experiments for control system testing, and simulation of combustor operations for testing of control system performance. The testing will involve control software-in-the-loop and control hardware-in-the-loop simulations. The response of flowfield to variations in the sensor-controller-actuator configurations will be evaluated. Phase II work will oversee the refinement of the existing control hardware prototype. Phase III commercialization will seek to exploit the natural dual-use applicability of the developed hardware. BENEFIT: In addition to military use, the generality of the controller design will be suitable for multi-use applications. Immediate use relates to optimization of flame-holder operations, and prevention of isolator unstart in scramjet combustors. It will also benefit areas where distributed flow control is of interest including: aerospace (L/D and maneuverability optimization), maritime (wake signature minimization), and automotive (combustion efficiency maximization). Controller hardware will be interfaceable with personal computers using low-cost PCI boards. Such an interface will allow for very efficient virtual prototyping of complete control systems.
Tagged as:
SBIR
Phase I
2009
DOD
USAF
Accurate and Efficient Computation of Electromagnetic Fields and Waves over Unbounded Regions in 3D
Amount: $749,665 Topic: AF081-001
ABSTRACT: The proposed project will remove the computational bottleneck in the currently adopted numerical treatment of exterior 3D magnetic fields around high-current pulsed power devices. Existing simulators introduce computationally expensive and nonphysical magnetic diffusion in the exterior region. In contrast, our approach is physically and mathematically rigorous and dramatically improves both accuracy and speed of the computation. In Phase I, our innovative methods for both quasi-static and wave components of 3D magnetic fields were developed, tested and validated on numerical and analytical model problems, both linear and nonlinear. Specific and verifiable advantages of our methodology include: (i) high accuracy due to rigorous analytical treatment of the exterior fields; (ii) no need for dense system matrices; (iii) no singular integration kernels; (iv) single scalar (as opposed to vector) potentials; (v) negligible computational overhead for the plasma simulator; (vi) ease of coupling with legacy interior codes such as Mach3; (vii) parallelizability; (viii) applicability to time-varying geometries. In Phase II, our algorithms will be implemented as robust software tools, combined with the interior MHD codes Mach3 and WARPX, and validated on the appropriate Air Force problems. Coupled field-circuit co-simulation capabilities for complex devices will be included. BENEFIT: Air Force missions require improvements and innovations in the modeling of 3D magnetic fields. The proposed project will provide innovative methods and software for highly efficient and precise computation of magnetic fields and waves around high-current pulsed power application systems. Potential dual and commercial applications are vast and diverse: fields around plasma fusion devices, magnetic recording, electromagnetic devices for oil exploration, quasi-static and electrodynamics problems of plasmonics (one of the most vibrant areas of nano-photonics), electromagnetic interference and capacitance of interconnects in microelectronics. The new modeling and simulation tools for 3D electromagnetic fields will help Air Force to: (i) assess technologies, devices, and materials for new high-current pulsed power application systems; (ii) better evaluate the performance at the early design stages; (iii) set requirements for testing; reduce the cost and time of testing. The modeling and design tools will provide reduction in cost and time-to-market through reduced experimental R&D, design cycle, and streamlined laboratory testing.
Tagged as:
SBIR
Phase II
2009
DOD
USAF
Co-Simulation Software for Rapid Prototyping of Vehicle Cooling Systems
Amount: $729,831 Topic: A07-214
Use of virtual, simulation-base prototyping is starting to routinely be used to streamline and optimize the design of vehicle cooling systems. A new generation of integrated simulation tools is however needed to effectively deal with the evolving complexities of the new cooling system designs. This proposal addresses this need. In Phase I we have developed and demonstrated a novel software capability for performing system analysis based on co-simulation concepts, and a unique approach enabling automatic, on-line optimization of cooling system operation. We have used a general engine model to delineate thermal response of the cooling system to different loads and engine speeds. In Phase II the developed prototype tools will be refined, and additional features will be added to enable designers to graphically prototype a system, optimize its functionality and distribute the analysis data from a single GUI. Using appropriate scaling a universal engine model will be developed allowing thermal analysis of a wide class of diesel powerplants. The tools will be validated and demonstrated on selected vehicle configurations selected in consultation and collaboration with the Army.
Tagged as:
SBIR
Phase II
2009
DOD
ARMY
Unified Methodology for Simulation of Continuum and Rarefied Flows
Amount: $99,924 Topic: MDA08-034
We propose to develop a stand-alone computational module for seamlessly extending the validity of continuum CFD codes into transitional and rarefied flow regimes. The module will be designed for implementation in to existing legacy codes for use in characterization of high altitude plume flows. The approach is based on a novel, regularized set of Navier-Stokes equations (RNS) that is extended to account for kinetic effects (intermediate Knudsen number, fluctuations) in the continuum approximation. RNS has several important features not found in classical NS equations that are of direct relevance high altitude plume flows: (a) Natural accounting of both continuum and rarefied gas flow regimes; and (b) Kolmogorov-scale field fluctuations resulting from a mathematical model that accounts for turbulent diffusion in a natural manner that allows direct simulation of phenomena such as laminar-turbulence transition and wall slip effects. Phase I will focus on development of a stand-alone, computational module prototype incorporating the RNS approach. The module will be connected to a characteristics-based high order compressible flow code with particle transport capabilities and will be exercised and evaluated against experimental data for a model problem that contains elements of both continuum and rarefied flows. Phase II will couple the module to flow and radiation codes used by MDA.
Tagged as:
SBIR
Phase I
2009
DOD
MDA
Accurate and Efficient Computation of Electromagnetic Fields and Waves over Unbounded Regions in 3D
Amount: $99,885 Topic: AF081-001
The proposed project will rectify the current bottleneck in the simulation of 3D magnetic fields around high-current pulsed power devices. In the existing software, fields in the air are approximated by an artificial magnetic diffusion equation, which is both computationally expensive and nonphysical. The proposed solution avoids any nonphysical quantities and relies on exact conditions for the quasi-static component of the field and on very accurate absorbing boundary conditions for the wave component, developed and validated by our consultant Prof. S. Tsynkov. Specific and verifiable advantages of our approach are: (i) High accuracy. The treatment of the unbounded outer region relies on a precise physical and analytical description of the exterior field and interface conditions. (ii) Dramatically reduced computational complexity: no grid is needed in the exterior region. (iii) Ease of coupling with the existing simulator, such as Mach3. (iv) Generality and efficiency for multiple simulations. Phase I includes innovative R&D of modeling 3D fields, with both quasi-static and wave effects of Maxwell’s equations included. Solutions to test problems will be calculated and compared with analytical and accurate numerical benchmarks to fully demonstrate the validity of the proposed approach. In Phase II, the innovative 3D algorithms will be implemented as software tools, coupled with the Air Force 3D-MHD codes and extended to problems with complex geometries of interest to Air Force .
Tagged as:
SBIR
Phase I
2008
DOD
USAF