Initial Findings on the Feasibility of Real-Time Feedback Control of a Hazardous Contaminant Released Into Channel Flow by Means of a Laboratory-Scale Physical Prototype

Flow Control ◽

Real Time ◽

Public Spaces ◽

Control Model ◽

Toxic Chemicals ◽

Current State ◽

Physical Prototype ◽

Computational Fluid Dynamics Cfd

The threat of accidental or deliberate toxic chemicals released into public spaces is a significant concern to public safety. The real-time detection and mitigation of such hazardous contaminants has the potential to minimize harm and save lives. We develop a computational fluid dynamics (CFD) flow control model with the capability of detecting and mitigating such contaminants. Furthermore, we develop a physical prototype to then test the computer model. The physical prototype is in its final stages of construction. Its current state, along with preliminary examples of the flow control model are presented throughout this paper.

Using Computational Fluid Dynamics and Finite Element Analysis to Determine Bolt Stresses Due to Thermal Cyclic Loading

ASME 2010 Pressure Vessels and Piping Conference: Volume 3 ◽

10.1115/pvp2010-26035 ◽

2010 ◽

Author(s):

Phil Martinez ◽

Sean M. McGuffie ◽

Michael A. Porter

Keyword(s):

Fluid Dynamics ◽

Finite Element ◽

Original Design ◽

Element Analysis ◽

Current State ◽

Art Practices ◽

Asme Code ◽

Areas Of Interest

This paper details the procedures necessary to accurately determine the stress in the bolts on a coke gasifier inlet flange using current state-of-the-art practices. Using accepted ASME Code practices (ASME [1]), the stress results are then used to justify the elimination of the spacers that were specified in the original design. Computational fluid dynamics (CFD) is employed to determine heat transfer coefficient distributions in the areas of interest. Finite element (FE) analysis is used to compute the transient assembly temperatures and related bolt stresses. By evaluating the bolt stresses as specified in ASME Div. 1 [1], these analyses were used to determine that the spacers could safely be eliminated during operation.

Viability of OpenFOAM as the Numerical Engine for Augmented Reality Sandbox

10.1115/fedsm2021-65991 ◽

2021 ◽

Author(s):

Elizabeth Smith

Keyword(s):

Fluid Dynamics ◽

Augmented Reality ◽

Shallow Water ◽

Open Source ◽

Real Time ◽

Numerical Algorithm ◽

Saint Venant Equations ◽

Dry Conditions ◽

Computational Fluid Dynamics Cfd

Abstract Many augmented reality sandboxes use a single purpose implementation of standard numerical schemes to solve the Saint-Venant equations for shallow water in real time. This work evaluates the open-source computational fluid dynamics (CFD) package OpenFOAM as an alternative to the custom implementations traditionally used. Many sandboxes are used in educational and research settings and CFD engines with costly licensing was not desirable. The goal of this work is to identify or create an OpenFOAM solver that handles features such as dry conditions and complex topographies. The existing shallowWaterFoam solver was identified as the best candidate but required modification to handle scenarios representative of the target application. Replacing the existing custom numerical algorithm with the OpenFOAM software will more easily allow future incorporation additional phenomena.

Perspective: Future Research Directions in Computational Fluid Dynamics

Journal of Fluids Engineering ◽

10.1115/1.2910256 ◽

1994 ◽

Vol 116 (2) ◽

pp. 212-215 ◽

Cited By ~ 2

Author(s):

R. W. Douglass ◽

J. D. Ramshaw

Keyword(s):

Fluid Dynamics ◽

Future Research ◽

Complex Flows ◽

Research Directions ◽

Simulation Research ◽

Current State ◽

Future Research Directions ◽

Real Fluids

The current state of computational fluid dynamics (CFD) has yet to reach its full promise as a general tool for engineering design and simulation. Research in the areas of code robustness, complex flows of real fluids, and numerical errors and resolution are proposed as directions aiming toward that goal. We illustrate some of the current CFD challenges using selected applications.

About the Use of Computational Fluid Dynamics (CFD) in the Framework of Physical Limnological Studies on a Great Lake

Reflexing Interfaces ◽

10.4018/978-1-59904-627-3.ch016 ◽

2011 ◽

pp. 257-277 ◽

Cited By ~ 1

Author(s):

Leonardo Castellano ◽

Walter Ambrosetti ◽

Nicoletta Sala

Keyword(s):

Fluid Dynamics ◽

Research Council ◽

National Research Council ◽

Computer Code ◽

Current State ◽

Consiglio Nazionale Delle Ricerche

In Situ Observations ◽

The aim of this chapter is to discuss how far computational fluid dynamics (CFD) is currently able to simulate the limnological physics of a complex natural body of water. The experience reported by the authors is in progress at the CNR- ISE (Consiglio Nazionale delle Ricerche, Istituto per lo Studio degli Ecosistemi; National Research Council, Institute of Ecosystem Study) of Pallanza, Italy. The main features of the current state of the art in this field of application of mathematical modeling techniques are summarized and the characteristics of the computer code now in use for our studies on Lake Maggiore are described in detail. Examples of the kind of information that can be extracted from the outputs are given to show how knowledge collected by traditional analysis of the experimental data and in situ observations can be improved with this kind of support. Forecasts for future trends are also suggested.

DESAIN AIRFOIL MENGGUNAKAN SOFTWARE CAEDIUM

GEMA TEKNOLOGI ◽

10.14710/gt.v17i1.8910 ◽

2012 ◽

Vol 17 (1) ◽

pp. 10

Author(s):

Wiji Mangestiyono

Keyword(s):

Fluid Dynamics ◽

Real Time ◽

3D Model ◽

Software System ◽

Simulation Environment ◽

3D Geometry ◽

Changes Over Time ◽

Over Time

Wiji Mangestiyono, in paper airfoil design use caedium software explain that caedium and its add-ons combine to form an easy-to-use Computational Fluid Dynamics (CFD) software system that can help to assess the performance of 3D model. Using Caedium add-ons can create any 2D or 3D geometry or import geometry from another CAD package. Then simulate how a gas (e.g. air) or liquid (e.g. water) will flow over and through geometry. Caedium is simple to learn and efficient to use. Every body can study how the physics of its model changes over time or as modify the model in real time. Caedium's unified simulation environment makes it easy to change the model on the fly and quickly see the results of the changes. Keywords : Caedium, Airfoil, Computation Fluid Dynamics

Computational Fluid Dynamics Applied to Lubricated Mechanical Components: Review of the Approaches to Simulate Gears, Bearings, and Pumps

Applied Sciences ◽

10.3390/app10248810 ◽

2020 ◽

Vol 10 (24) ◽

pp. 8810

Author(s):

Lorenzo Maccioni ◽

Franco Concli

Keyword(s):

Fluid Dynamics ◽

Mechanical Systems ◽

Computational Domain ◽

Power Losses ◽

Cfd Simulations ◽

Current State ◽

Mechanical Components ◽

Complex Mechanical Systems

The lubrication of the mechanical components reduces friction, and increases the efficiency and the reliability. However, the interaction of moving components with the lubricant leads to power losses due to viscous and inertial effects. Nowadays, the study of lubricant behavior can be carried out through computational fluid dynamics (CFD) simulations. Nevertheless, the modeling of the computational domain within complex mechanical systems (e.g., ordinary, planetary and cycloidal gearboxes, roller bearings, and pumps) requires the exploitation of specific CFD techniques. In the last decades, many mesh-based or meshless approaches have been developed to deal with the complex management of the topological changes of the computational domain or the modeling of complex kinematics. This paper aims to collect and to classify the scientific literature where these approaches have been exploited for the study of lubricated mechanical systems. The goal of this research is to shed a light on the current state of the art in performing CFD analysis of these systems. Moreover, the objective of this study is to stress the limits and the capabilities of the main CFD techniques applied in this field of research. Results show the main differences in terms of accuracy achievable and the level of complexity that can be managed with the different CFD approaches.