![StreamCFD](/img/default-banner.jpg)
- 31
- 109 128
StreamCFD
India
Registrace 10. 07. 2009
Computation fluid dynamics
CFD-Based Plume Rise Height Prediction using Fire Dynamics Simulator (FDS)
In atmospheric dispersion modeling, predicting the plume rise height of stack emissions is a crucial exercise. This video explores a specific example based on empirical correlations and computational fluid dynamics (CFD) simulations. Drawing from Stull’s empirical correlation for plume rise height in a stable atmospheric boundary layer, we simulate the behavior of a stack emitting sulfur dioxide (SO2) to understand its dispersion characteristics.
The example provided by Stull [149] involves a stack with a height of 75 meters, emitting SO2 at a rate of 250 grams per second. The exit velocity of the gases is 20 meters per second, with a temperature difference of 180 Kelvin above ambient conditions (293 Kelvin). The stack features an orifice with a radius of 2 meters, and the wind speed is maintained at 2 meters per second.
In atmospheric dispersion modeling, predicting the plume rise height of stack emissions is a crucial exercise. This video explores a specific example based on empirical correlations and computational fluid dynamics (CFD) simulations. Drawing from Stull’s empirical correlation for plume rise height in a stable atmospheric boundary layer, we simulate the behavior of a stack emitting sulfur dioxide (SO2) to understand its dispersion characteristics.
The example provided by Stull [149] involves a stack with a height of 75 meters, emitting SO2 at a rate of 250 grams per second. The exit velocity of the gases is 20 meters per second, with a temperature difference of 180 C above ambient conditions (20 C) . The stack features an orifice with a radius of 2 meters, and the wind speed is maintained at 2 meters per second.
#CFDAnalysis #FireDynamicsSimulator #FDS #PyroSim #Pathfinder #FireSafety #FireSafetyIndia #RailwayFireSafety #FireSimulation #SmokeControl #BuildingFireSafety #ThermalAnalysis #FireModeling #MoninObukhovSimilarity #WindMethod #WindProfile #MeteorologicalConditions #PressureGradientForce #CoriolisForce #GeostrophicWind #SurfaceRoughness #TemperatureStratification #StackEffect #PlumeRise #AtmosphericDispersion #SulfurDioxide #SO2Emissions #StackEmissions #CFD #ComputationalFluidDynamics #FDSSimulation #StableAtmosphere #TemperatureGradient #WindSimulation #BuoyancyEffect #EnvironmentalModeling #AirQuality #PollutionModeling #SimulationOutputs #MeshConfiguration #VelocityField #TemperatureDistribution #PollutantDispersion #SimulationVisualization #VortexFlow #FlowDynamics #TurbulentFlow #VortexDynamics #FluidMotion #AirflowPatterns #FireSafetyEngineering #FireDetectionSystems
The example provided by Stull [149] involves a stack with a height of 75 meters, emitting SO2 at a rate of 250 grams per second. The exit velocity of the gases is 20 meters per second, with a temperature difference of 180 Kelvin above ambient conditions (293 Kelvin). The stack features an orifice with a radius of 2 meters, and the wind speed is maintained at 2 meters per second.
In atmospheric dispersion modeling, predicting the plume rise height of stack emissions is a crucial exercise. This video explores a specific example based on empirical correlations and computational fluid dynamics (CFD) simulations. Drawing from Stull’s empirical correlation for plume rise height in a stable atmospheric boundary layer, we simulate the behavior of a stack emitting sulfur dioxide (SO2) to understand its dispersion characteristics.
The example provided by Stull [149] involves a stack with a height of 75 meters, emitting SO2 at a rate of 250 grams per second. The exit velocity of the gases is 20 meters per second, with a temperature difference of 180 C above ambient conditions (20 C) . The stack features an orifice with a radius of 2 meters, and the wind speed is maintained at 2 meters per second.
#CFDAnalysis #FireDynamicsSimulator #FDS #PyroSim #Pathfinder #FireSafety #FireSafetyIndia #RailwayFireSafety #FireSimulation #SmokeControl #BuildingFireSafety #ThermalAnalysis #FireModeling #MoninObukhovSimilarity #WindMethod #WindProfile #MeteorologicalConditions #PressureGradientForce #CoriolisForce #GeostrophicWind #SurfaceRoughness #TemperatureStratification #StackEffect #PlumeRise #AtmosphericDispersion #SulfurDioxide #SO2Emissions #StackEmissions #CFD #ComputationalFluidDynamics #FDSSimulation #StableAtmosphere #TemperatureGradient #WindSimulation #BuoyancyEffect #EnvironmentalModeling #AirQuality #PollutionModeling #SimulationOutputs #MeshConfiguration #VelocityField #TemperatureDistribution #PollutantDispersion #SimulationVisualization #VortexFlow #FlowDynamics #TurbulentFlow #VortexDynamics #FluidMotion #AirflowPatterns #FireSafetyEngineering #FireDetectionSystems
zhlédnutí: 138
Video
Train Compartment Fire Detection using Smoke Detection Sensors, CFD Analysis using FDS
zhlédnutí 161Před měsícem
Train Compartment Fire Detection using Smoke Detection Sensors, CFD Analysis using Fire Dynamics Simulator (FDS) Description The objective of this simulation is to assess the Fire Detection system in the Third AC coach of Indian Railways using Computational Fluid Dynamics (CFD) tools. The primary focus of this report is on analyzing fire and smoke spread within the coach. The study aims to dete...
Carpark Fire Simulation using Fire Dynamics Simulator (FDS)
zhlédnutí 1,2KPřed 2 lety
Carpark Fire Simulation using Fire Dynamics Simulator (FDS) The objective of the present work is to analyse the Jet fan ventilation system of a carpark using Computational Fluid Dynamics (CFD)Analysis in emergency ventilation scenarios. To download the files and resources used in this video- res-download.herokuapp.com/ The specific aim of the emergency ventilation study is to check whether it m...
Office Fire Simulation and Sprinkler Activation using Fire Dynamics Simulator (FDS)
zhlédnutí 2,9KPřed 3 lety
Office Fire Simulation and Sprinkler Activation using Fire Dynamics Simulator (FDS). To download the files and resources used in this video- res-download.herokuapp.com/ This example simulates fast growing office equipment fire. Temperature rises due to fire and sprinkler near fire activates and extinguishes the fire. A fire sprinkler system is an active fire protection method, consisting of a w...
#Tesla Valve #Flow #Simulation using #Ansys #Discovery Live
zhlédnutí 6KPřed 3 lety
A #Tesla valve, called by Tesla a valvular conduit, is a #fixed-geometry #passive check valve. It allows a fluid to flow #preferentially in one direction, without moving parts. To download the files and resources used in this video- res-download.herokuapp.com/ This #simulation is done using #Ansys Discovery Live Student 2020 R2. Based on brand new instantaneous simulation technology, Ansys Disc...
Ansys Discovery Live
zhlédnutí 692Před 4 lety
Ansys Discovery Live To download the files and resources used in this video- res-download.herokuapp.com/ Download your trial from here www.ansys.com/en-in/academic/free-student-products
#Simulating #Piston Effect in #Underground #Metro #Tunnel- #Ansys #CFX Tutorial
zhlédnutí 7KPřed 4 lety
#CFD #analysis of #Piston #effect #simulation in #underground #metro #tunnel, using #ANSYS #CFX 19 To download the files and resources used in this video- res-download.herokuapp.com/ This #tutorial #simulates piston effect in a underground metro tunnel. I have included following steps- 1. #Design Modeler #Modeling- create 3D model using Ansys design modeler. 2. Meshing- create mesh using Ansys ...
#Buoyant #Flow in a #Partitioned #Cavity - #ANSYS CFX Tutorial
zhlédnutí 2,5KPřed 5 lety
To download the files and resources used in this video- res-download.herokuapp.com/ In this tutorial you will learn about: • Using #CFX-4 Mesh Import. • Setting up a time dependent (transient) simulation. • Modeling #buoyant flow. The goal of this tutorial is to model a #buoyancy-driven flow that requires the inclusion of #gravitational effects. The model is a 2D partitioned cavity containing a...
Modeling Periodic Flow and Heat Transfer- ANSYS Fluent Tutorial
zhlédnutí 2,7KPřed 5 lety
To download the files and resources used in this video- res-download.herokuapp.com/ This tutorial illustrates how to set up and solve a periodic heat transfer problem, given a pre-generated mesh. The system that is modeled is a bank of tubes containing a flowing fluid at one temperature that is immersed in a second fluid in cross flow at a different temperature. Both fluids are water, and the f...
Fluid Flow and Heat Transfer in a Mixing Elbow- ANSYS Fluent Tutorial
zhlédnutí 3,8KPřed 5 lety
In this tutorial you will learn how to perform Fluid Flow and Heat Transfer in a Mixing Elbow using ANSYS Workbench. To download the files and resources used in this video- res-download.herokuapp.com/ • Launch ANSYS Workbench. • Create a Fluent fluid flow analysis system in ANSYS Workbench. • Create the elbow geometry using ANSYS DesignModeler. • Create the computational mesh for the geometry u...
Flow Around a Blunt Body- Ansys CFX Tutorial
zhlédnutí 3,5KPřed 5 lety
This tutorial is the part of ANSYS CFX official tutorial. To download the files and resources used in this video- res-download.herokuapp.com/ In this tutorial you will learn about: • Solving and postprocessing a case where the geometry has been omitted on one side of a symmetry plane. • Using free-slip wall boundaries as a compromise between accurate flow modeling and computational grid size. •...
Flow in a Process Injection Mixing Pipe- Ansys CFX Tutorial
zhlédnutí 6KPřed 5 lety
This tutorial is the part of ANSYS CFX official tutorial. To download the files and resources used in this video- res-download.herokuapp.com/ In this tutorial you will learn about: • Applying a profile boundary using data stored in a file. • Visualizing the velocity on a boundary in CFX-Pre. • Using the CFX Expression Language (CEL) to describe temperature-dependent fluid properties in CFX-Pre....
FDS Tutorials, 1- Downloading and installing FDS v6.7.0 on Windows
zhlédnutí 14KPřed 5 lety
FDS Tutorials, 1- Downloading and installing FDS v6.7.0 on Windows
#Office Fire #Emergency #Evacuation #Simulation using #FDS+EVAC
zhlédnutí 12KPřed 6 lety
#Office Fire #Emergency #Evacuation #Simulation using #FDS EVAC
Stack Effect Simulation using Fire Dynamics Simulator (FDS)
zhlédnutí 4,1KPřed 6 lety
Stack Effect Simulation using Fire Dynamics Simulator (FDS)
Carpark fire simulation- Visibility Slices, Fire Dynamics Simulator (FDS)
zhlédnutí 2,8KPřed 6 lety
Carpark fire simulation- Visibility Slices, Fire Dynamics Simulator (FDS)
Carpark fire simulation- Velocity Slices, Fire Dynamics Simulator (FDS)
zhlédnutí 1,6KPřed 6 lety
Carpark fire simulation- Velocity Slices, Fire Dynamics Simulator (FDS)
Carpark fire simulation- Temperature Slices, Fire Dynamics Simulator (FDS)
zhlédnutí 972Před 6 lety
Carpark fire simulation- Temperature Slices, Fire Dynamics Simulator (FDS)
Carpark fire simulation- Smoke , Fire Dynamics Simulator (FDS)
zhlédnutí 3,7KPřed 6 lety
Carpark fire simulation- Smoke , Fire Dynamics Simulator (FDS)
Carpark fire simulation- Temperature Slices, Fire Dynamics Simulator (FDS)
zhlédnutí 965Před 6 lety
Carpark fire simulation- Temperature Slices, Fire Dynamics Simulator (FDS)
Flow from a Circular Vent- Ansys CFX Tutorial
zhlédnutí 3,2KPřed 6 lety
Flow from a Circular Vent- Ansys CFX Tutorial
AHU Performance Improvement using Computational Fluid Dynamics (CFD)
zhlédnutí 3,8KPřed 6 lety
AHU Performance Improvement using Computational Fluid Dynamics (CFD)
Simulating Flow in a Static Mixer Using CFX in Stand-alone Mode
zhlédnutí 3,8KPřed 6 lety
Simulating Flow in a Static Mixer Using CFX in Stand-alone Mode
Fan performance simulation- rotor stator, in ANSYS CFX
zhlédnutí 2,4KPřed 6 lety
Fan performance simulation- rotor stator, in ANSYS CFX
Piston effect simulation in underground metro tunnel
zhlédnutí 10KPřed 6 lety
Piston effect simulation in underground metro tunnel
Simulating Immersed Solid - Ansys CFX tutorial
zhlédnutí 8KPřed 6 lety
Simulating Immersed Solid - Ansys CFX tutorial
Thermal and Airflow Analysis of Air Cooled Chiller Installation with Evaporative Wet Pads
zhlédnutí 269Před 6 lety
Thermal and Airflow Analysis of Air Cooled Chiller Installation with Evaporative Wet Pads
Download and install #VMware #Workstation #Player
zhlédnutí 89Před 6 lety
Download and install #VMware #Workstation #Player
Very nice 👍
Thank you 👍
you can flip the scale bar color with ; button to show higher visibility in blue color which will be intuitively seen as a positive outcome
Can you please provide the code of the following
Hi Adeeb, this video is related to project. Will not be able to share code. However, I can do it for you as a separate project, let me know. Thanks
Haiii can i get source file? Your drive is expire…
10-1/3*22不等于0,这意味着列车不会减速到0,但是在cfx中可以瞬间减速到0吗?或者为什么不将时间设置为 30 秒,这样它就可以减慢到 0
please provide the geometry and mesh files. the links arent opening
Which software?
Ansys CFX
That guy at the top right corner is me. I always look so weird.
Sir I am doing rotating hollow shaft inside which the oil is being filled. And the shaft is having small holes so that the oil splashes away to cool the stationery components around it due to centrifugal force when it is rotated. How to do this sir?
Hi, is it possible to get the source code/setup of this case?So that I can try to re-run this case
hello can i get also the example mesh in your vid badly needed for our act. thank you
thank you for the tutorial, it works, but how to run the couch.smv file? thank you
i just discover the app from smv folder. thanks btw
need fd s n++ file please
Looks impressive! 😀 How were sources immitating fire (heat, smoke, soot sources) chosen? 🤔
Upload the tutorial pls, i need tutorial for meshing
I do all steps like you but I wanna see the resultats on SMV nothing happen on the couch ;there wasn't fire could you tell me where is the problem.
hello, is that the legal website to download the FDS?
yes, fds is open source and its completely legal to download and use
Hello friend, there is a new file download about FDS v6.7.6, is a new release. After download it, I installed it, but doesn´t work, because is missing a library "impi.dll". Can you help me? Can you make a new video? thanks.
have you solved this problem, i am facing the same problem
@@saurabhsuman9863 same problem
How to set simulation?
i have send the request can please accept for fds file please
Hi I am Krishna a MSc student I want to do a similar kind of CFD But I need a little help It won’t be more than an hour If you can contact me we can discuss about it further Innanikv24@gmail.com Is my email Thank you
What does Bouy.Ref.Temp mean?
Your explanation is so good. We are a startup looking forward to tie up with you as an industry expert. Please share your email so I can send details.
streamcfd.a@gmail.com
@@StreamCFD1 Please check email from Fresher2Pro
you saved my life.
Nice video thanks a lot
Muchas gracias
Thanks you for the video Is it possible for you to make a video on how to model a steel portal frame structure and apply fire using the standard curve?
Send details to streamcfd.a@gmail.com.
Can this software and test still be downloaded ? the link seems broken...
Ansys has removed link, try requesting free trial
ERROR: Simple chemistry fuel, POLYURETHANE, not defined on REAC or SPEC. (CHID: carpark_fire) I try to use the template and get this error, is any thing wrong?
Thank you
How to import autocad and revit in this software?
you can not directly import cad file
Interesting, do you have 2d model for this project?
seems like ansys removed this page, you can request free trial
thanks for sharing fds file. why did you set HVAC properties in Louvered output of Jet fans? these numbers how calculate? (I have a Jet fan with 30 degree angled in Z plan) what is exactly UVW in louverd HVAC Vent? thanks in advance
UVW is the vector indicating the direction of flow from the VENT. For example: &OBST XB=1.0,2.0,0.0,1.0,0.0,1.0 / &VENT XB=1.0,1.0,0.0,1.0,0.0,1.0, SURF_ID='HVAC', ID='HVAC OUTLET', UVW=-1,0,1 / The above input defines a vent lying in the y-z plane facing in the x direction. The flow vector indicates that the flow from this vent is in the -x direction with a 45 degree up angle (the x and z components are equal in size). FDS will set the tangential velocity of the vent to obtain the specified direction indicated by UVW. This will only be done if the vent is inputting gas into the domain. Note that the values given for UVW are normalized to a unit vector. For details refer to section 12.2.7 of FDS user guide
@@StreamCFD1 thanks for your answer. In above example for a vent 30 degree up angle in vector form: Vel=[-cos(30)i+0j+sin(30)k]*velocity Vel=[Ui+Vj+Wk]*velocity is it correct?
Sir, I am a mechanical engineering undergraduate student. My thesis topic is about metro train passing through a tunnel using ansys fluent. This includes sliding mesh and user defined function. I have liked your geometry. May I use your geometry concept??If you permit it, this will be very helpful for me.
Yes
10-1/3*22不等于0,这意味着列车不会减速到0,但是在cfx中可以瞬间减速到0吗? 或者为什么不将时间设置为 30 秒,这样它就可以减慢到 0?
hello friend , this video was so informative. Usually I use fluent . I am mechanical engineering senior student and my graduation is related some how to underground motion. if it possible to have this Ansys files it would be helpful for me to study the pressure and velocity contours. I appreciate your help and thanks in advance. i.ibrahim@nu.edu.eg ibrahimashraf94@gmail.com
Modeling procedure is also explained in video, give it a try. In the meanwhile if I can find the file will share link.
@@StreamCFD1 did you find it friend ?
HI. I am actually doing a project of determining the minimum extinguishing concentration of fire extinguishers using FDS. Can you please help me on how to do the simulation. Thanks in advance
Please send your query to streamcfd.a@gmail.com
@@StreamCFD1 Thanks
I want to know how can you calculate mixing performance in this situation (Not considering heat conduction)
I have explained everything in this video czcams.com/video/fBtHV6wAUJ4/video.html
@@StreamCFD1 You are almost or better than peacemaker or super hero but only dealt with pressure and velocity contour.
Can the Ansys fluid dynamics software simulate the effects of heated or cooled fluids within a system?
Yes it can, you can add heat generation
Interesting, but there is something wrong with the simulation. Those particles go right through the pointy parts of the wall, thus re-merging with the rest of the stream at more of a 90-degree angle than an almost 180-degree angle.
I don't think that's an error. I watched another video that demonstrates the flow with actual water by injecting dye, and you can see the same pools of relatively stagnant water that block the flow, redirecting it to round the corners rather than continuing in the reverse direction. And that's basically what I expected to happen; the description I've heard in other sources that say it would hit at a a near 180-degree angle really sounded very much like either an oversimplification or possibly a naive rationalization.
@@hurkyl1560 I'm not necessarily doubting the qualitative result but I looked at it frame by frame and things really move through solid walls in the video.
@Penny Lane, Yes I have observed that, actually idk why ansys discovery is ignoring that small feature, there should be some settings to control defeaturing size.
@@StreamCFD1 I was assuming the depicted boundaries didn't match exactly the boundaries in the simulation, but I don't know the software.
Thank you for this video do you know how to directly run the fds file by clicking on it?
there is no builtin method to run fds file by click. you have to run via command prompt
👌
Hi, I'm trying to set up something similar but I am using a shell element rather than a 3D solid - how can i do this? Any help would be really appreciated thanks
Two overlapping bodies shall be present and meshed seperately. Thereafter proceed as in video
Very nice video! Which approach are you using? Sliding mesh? Frozen rotor? It would be amazing to see the full tutorial. Thanks
This is done using sliding mesh. Will upload tutorial soon.
Thank you so much for this video! It’s very helpful!
Awesome simulation! I'm very curious what type of applications this fan has...Looks like a ship engine?
This is mixed flow inline fan, used for ducted ventilation
StreamCFD thanks.
Sir many thanks for your reply. But I have few more queries as follows: (1)Background of final train velocity used in Expression. (2)Function of station door. (3)In metro we have observed that tunnel is terminated at the entry and exit of station box. here the tunnel is continuing throughout the station. (3) What is meant by acceleration 120/360 m/sec2 (4)What is meant by Train arrival and train departure time? Is it the time gap from the train enters in station till stop? similarly time of departure till the last compartment leaves the station after the engine starts?
1)final train velocity make sure train doesn't reverse after stopping. 2) station door is modelled as opening. 3) that is model specific. I have modelled underground tunnel. 4) that is 0.3333333... written in fraction form for accuracy. 5) tArrive is when train is completely stopped after reaching at station. tDepart is when train starts moving again to leave station.
Please elaborate the background physics of variable acceleration and velocity programmed by you under expression.
first equation of motion is used to define velocity: v= u +a*t where: v- final velocity u- initial velocity a- acceleration t- time -stopping and starting acceleration is assumed to be constant as 0.33 m/sec square, written as fraction. acc variable is defined as: -when t<tArrive train is de-accelerating i.e. acceleration is negtive , that is defined by acc variable as -peakAcc -when t is between tArrive and tDepart train is on station, not moving, train is velocity and acceleration is zero - when t>tDepart acceleration is positive, defined by peakAcc - velocity variable is defined using equation of motion as given above. Try plotting velocity and acceleration variable using details/plot tab. things will be more clear.
Please making a simulation video of fluid mixing in tank in ansys fluent..
Hi Sir Can we do turbulence modeling on this?? I know you have mentioned that turbulence modeling is not possible in immersed solids. But if we want to do how we can do that??
Turbulence model can be added, but near train results will not be accurate. If that is required you can use moving mesh approach.