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Climate CFD
United Kingdom
เข้าร่วมเมื่อ 21 พ.ค. 2019
Climate CFD provides computational fluid dynamics training tutorials using Ansys CFX and Ansys Fluent.
Tutorials consist of aerodynamics, fluid dynamics, heat transfer and fluid-structure interaction tutorials.
For consultation and training enquiries contact climatecfd@gmail.com
Tutorials consist of aerodynamics, fluid dynamics, heat transfer and fluid-structure interaction tutorials.
For consultation and training enquiries contact climatecfd@gmail.com
Ahmed Body Subjected to an Unsteady Gust Using Ansys CFX
In this tutorial we subject an Ahmed body to a transient gust using Ansys CFX.
The geometry is developed in Design Modeller and meshed in Ansys Meshing. The transient wind is written in the Common-Expression Language and is applied to the simulation via an expression.
The simulation is post-processed in CFD-Post and isosurfaces of static pressure and streamlines are used to visualise the flow.
The geometry is developed in Design Modeller and meshed in Ansys Meshing. The transient wind is written in the Common-Expression Language and is applied to the simulation via an expression.
The simulation is post-processed in CFD-Post and isosurfaces of static pressure and streamlines are used to visualise the flow.
มุมมอง: 101
วีดีโอ
How To Simulate A Stirred Tank In Ansys CFX With MRF and Sliding Mesh
มุมมอง 1.1K5 หลายเดือนก่อน
In this video we use Ansys CFX within Ansys Workbench to perform moving reference frame (MRF) and rigid body motion (RBM) simulations to model an impeller stirring a tank of water. We develop the CAD for the two domains in Design Modeller and create the boundary conditions in Ansys CFX. Convergence is determined through asymptotic behaviour of the torque on the impeller around the axis of rotat...
How To Create Variables in Ansys CFD Post
มุมมอง 7695 หลายเดือนก่อน
In this short video we use an existing simulation to show how to create variables from existing ones. In this example we use the CFX expression language to create Cp from Pressure and U from Velocity Magnitude. Hope this helps. If you have any video requests, pop them in the comments.
How to Obtain Drag Coefficient On Surfaces In Ansys CFX
มุมมอง 1.6K6 หลายเดือนก่อน
In this video we use CFX in Ansys Workbench to simulate the aerodynamic flow around a cube. Expressions are then used to calculate the force coefficients on different surfaces of the cube. Finally, some post-processing is done using streamlines and surface pressure. If you have any CFD topic that you would like to see in a video, please let me know in the comments.
Drag Reduction of an Ahmed Body Using Shape Optimisation Ansys CFX Direct Optimisation Tutorial
มุมมอง 1.2K2 ปีที่แล้ว
In this tutorial we use Ansys Direct Optimisation tool to reduce the drag on an Ahmed body by applying shape optimisation to the front surface and rear stant. The Ahmed body model is created in Design Modeller, the setup and boundary conditions in CFX Pre and post-processing is conducted in CFD-Post. An expression for drag coefficient is created for our target quantity to minimise. The front ed...
Compressible supersonic flow around a bullet Ansys CFX
มุมมอง 1.4K2 ปีที่แล้ว
In this tutorial we simulate the supersonic flow around a bullet in Ansys CFX. The simulation uses air as an ideal gas and uses thermal energy and the k-epsilon turbulence model. Post-processing in CFD post visualises pressure, density and yPlus.
Ansys Fluent CFD Simulation of the Aerodynamic Flow Around An Ahmed Body
มุมมอง 1.6K2 ปีที่แล้ว
In this tutorial the aerodynamic flow around an Ahmed body is simulated using Ansys Fluent. CAD for the Ahmed body is created in Design Modeller, and is the dimensions from the original Ahmed et al paper (flowvision.ru/images/articles/2020/Add_files/Ahmed_1984.pdf) The steady-state simulation uses incompressible flow and the SST K-Omega model to model turbulence. Force coefficients are calculat...
Transient CFD Simulation of a Radiator Heating a Room Using Ansys CFX and Design Modeller For HVAC
มุมมอง 11K2 ปีที่แล้ว
In this video we use Ansys CFX to perform a transient/unsteady CFD simulation of a radiator heating a small room. The thermal simulations is analysed using CFD Post with a section plane and volume rendering. An animation of volume rendering is exported to a video file. Te boundary conditions are fixed temperature boundary conditions fro the radiator, convective heat transfer at the walls and an...
How to Model Wind Driven Rain and Wetting Area | Simulation Tutorial Using Ansys CFX
มุมมอง 3.3K4 ปีที่แล้ว
In this tutorial you will learn how to: - Model wind driven rain using particle transport solids in Ansys CFX. - Apply buoyancy forces. - Calculate wetting in Ansys CFD Post. Useful Books and Resources Wind Effects on Structures: Modern Structural Design for Wind 4th Edition by Emil Simiu and DongHun Yeo amzn.to/35n7uGS
Shell and Tube Heat Exchanger Simulation Ansys CFX Workbench
มุมมอง 9K4 ปีที่แล้ว
If you found this helpful, please like and subscribe. It helps the channel grow and each more people just like you. In this video you will learn how to set up a shell and tube heat exchanger simulation in Ansys CFX ad perform some very basic post-processing. The CAD fro the shell and tube heat exchanger was created in Ansys Design Modeller and the heat transfer and fluid simulation was simulate...
Calculating Overall Heat Transfer Coefficient for a Shell and Tube Heat Exchanger in Ansys CFX
มุมมอง 8K4 ปีที่แล้ว
In this video you will learn how to create expressions to calculate overall heat transfer coefficient in Ansys CFD Post. This is a follow-on video from a previous tutorial that can be found here: th-cam.com/video/cX3eHOdZxjk/w-d-xo.html Get the files: payhip.com/b/KHrNW
How to create a transient inlet boundary condition using expressions in Ansys CFX
มุมมอง 4.3K5 ปีที่แล้ว
In this video you will learn - How create expressions. - Create prism layers. - Monitor forces in CFX Solver Manager. - Visualise velocities using CFD Post.
How to calculate turbine RPM using Ansys CFX
มุมมอง 41K5 ปีที่แล้ว
In this video you will learn: - How to create a rotating domain - Freeze and unfreeze fluid bodies - Use parameter set to determine the net torque on a turbine Get the files: payhip.com/b/Hef0T If you have any questions, queries or recommendations for future videos, please leave them in the comments section below. This video was made in response to CFD-Online queries about the error message "An...
How to use Parameter Set In Ansys CFX Tutorial
มุมมอง 15K5 ปีที่แล้ว
In this video tutorial you will learn - How to create Workbench input parameters - How to create Workbench output parameters - How to obtain data from a parameter sweep in Ansys CFX The video refers to a previous tutorial which uses expressions in Ansys CFX which can be found here: th-cam.com/video/NxEmfZUdaEk/w-d-xo.html
Why Do Canal Boats Go So Slow?
มุมมอง 1835 ปีที่แล้ว
Canal boats were formerly a tool of industry, but now are a tool of leisure. In this video you will learn - What are the main fluid dynamic influences that limit vehicle speed? - What wave sizes are caused by canal boats.
Calculating heat transferred from fluid in concentric heat exchanger using Ansys CFX Postflow
มุมมอง 7225 ปีที่แล้ว
Calculating heat transferred from fluid in concentric heat exchanger using Ansys CFX Postflow
Concentric Tube Heat Exchanger Ansys CFD CFX Part 2: Mesh and setup
มุมมอง 1.1K5 ปีที่แล้ว
Concentric Tube Heat Exchanger Ansys CFD CFX Part 2: Mesh and setup
Concentric Tube Heat Exchanger Ansys CFD CFX Part 1: Geometry
มุมมอง 1.6K5 ปีที่แล้ว
Concentric Tube Heat Exchanger Ansys CFD CFX Part 1: Geometry
Extracting surface pressure from an aerofoil in CFD Post | Climate CFD
มุมมอง 4.8K5 ปีที่แล้ว
Extracting surface pressure from an aerofoil in CFD Post | Climate CFD
Importing pressure loads into Ansys mechanical
มุมมอง 10K5 ปีที่แล้ว
Importing pressure loads into Ansys mechanical
How to create expressions in Ansys CFX - Power law velocity inlet profile example
มุมมอง 18K5 ปีที่แล้ว
How to create expressions in Ansys CFX - Power law velocity inlet profile example
Simulation of the airflow over a car spoiler using Ansys CFX
มุมมอง 8K5 ปีที่แล้ว
Simulation of the airflow over a car spoiler using Ansys CFX
Thermal simulation of water through a pipe using Ansys CFX
มุมมอง 1K5 ปีที่แล้ว
Thermal simulation of water through a pipe using Ansys CFX
Water Flowing Through Pipe using Ansys CFX
มุมมอง 17K5 ปีที่แล้ว
Water Flowing Through Pipe using Ansys CFX
Excellent video: short yet detailed!
@@Amod2050 thank you. Verbosity just confuses pepple
I am failing to highlight the radiator when I am about to mesh it, what could be the reason?
@@sibonisozakwe3805 have you tried changing to surface select? Sometimes edge select is on my default.
You can calculate the torque and power....you could make a video of this with this example....and that the upper surface is free to the environment to see how bubbles are generated with air inside the water
@@danieltueros4025 take a look at the turbine video on this channel. That shows a method.
How long is the total running time?
@@congatinh4261 I don’t remember, but I assume only a few minutes with that mesh resolution.
sir what if the Cp is not constant like in Super critical co2
@@jaforikbal6388 hi, I’m not sure. You’ll have to set those fluid properties at the inlet.
Hello, thank you for the tutorial. It is very useful. I have a questions, I already follow all of the steps. But, when I tried to vary the rotational speed, the value of the torque did not change. Do you have any clues about this? Thank you so much.
Hello, Thank you. Glad it helped. It’s hard to say without seeing the case. Have you tried clearing the results and rerunning?
@@ClimateCFD yes, i cleared it but the torque still the same. is it possible to send the image of the case? thank you very much.
@@naufalriyandi7228 sure, climatecfd@gmail Com
I did everything the same, but my output parameters are not changing. The value remains constant, as if it is stalled.
Make sure the expression is used to set the inlet velocity/angular velocity.
"I got a code "Update failed for the Solution component in Fluid Flow (CFX). The solver with a non-zero exit code of: 2. Do you have a suggestion?
Check your license
If that fails, clear the solution and retry.
My man! thanl you!
You’re welcome!
Could you provide insights into how the choice of parameters for the transient gust simulation was made? I'm particularly curious about the considerations behind selecting the Common-Expression Language for modeling the wind dynamics. Additionally, how did you ensure the accuracy and reliability of the simulation results, especially in terms of capturing the transient behavior of the flow around the Ahmed body?
Hi GPT Joe, The parameters we chosen because the formed a sinusoidal gust, but by squaring the sine term it prevented the lateral velocity term from going negative. There are better gust models, that produce a more physical natural wind approximation, however this one was chosen because of ease of implementation. I would not trust the accuracy of the results because of the reasons stated in the video.
@@ClimateCFD who is GPT Joe?
@@ShropVentures this annoying guy I know.
Hello sir, I'm one of your TH-cam followers. I'm currently facing an issue in running a simulation of a Savonius wind turbine. I'm working on my thesis which needs to be completed, and I'm struggling to meet the demands of my thesis supervisor who requires obtaining RPM directly from Ansys simulation. The variables I'm using include wind speed variations from 1m/s to 7m/s. If you would be willing to create a tutorial video, I would be extremely grateful to you.
Drop me an email at climatecfd@gmail.com
@@ClimateCFD OK sir, thank you. I will send it soon
What is the diferantation CFX and Fluent?
Two different solvers. CFX originally from a different company. Apparently it is more robust. Now they’re basically the same.
really good
Thank you 🙏
@@ClimateCFD You're welcome. I have a question about Fluent PP. Using Reports - Flows - Total Heat Transfer Rate, the user receives an output that breaks down thermal performance by domain component. How is the thermal power calculated under the inlet boundary condition? Thank you.
@@AR-yj4ft it’s been a while since I have seen this so will have to double check. However thermal power is usually Q_dot = m_dot * Cp * (T2 - T1)
@@ClimateCFD allow me to explain in-depth the energy balance in a domain if you don't mind. Energy flux through a non-wall boundary like inlet / outlet is the enthalpy, calculated as Cp * T(inlet). Typically, Fluent reports the enthalpy on non-boundaries as specific enthalpy (J/kg) weighted by flow rate (kg/s) -> (J/s) -> (W). Whereas the energy fluxes reported through wall boundaries are different. They are Q = HTC * Surface area * (Tenv - Tfluid), where the HTC has to be clearly defined. Fluent reports integral of Wall Fluxes -> Total Surface Heat Flux (W). Thank you for exciting discussion!
Do you have any similar WDR tutorial using fluent?
No, but I can make one. What are you trying to achieve?
@@ClimateCFD That would be really helpful if you could do one in Fluent. Unfortunately, there is no tutorial available for WDR using Fluent. Overall, I am trying to find the wet catch ratio.
10:19
Equation for the power law is here ☝️
how did you create those input parameters in CFX?
Create a variable and set as input parameter.
ow do you do IGES mine doesnt let me its not a specific file, im forced to use a stl and then in the results it doesnt let me import files bigger than 200 kb saying that it needs stl ASCII format when i already have stl format
Depends where you are getting your CAD from. STL is a surface file so will have come from some CAD software.
Is it possible to find the RPM of turbine ?
From the above method, yes.
I'm so happy you're back. May I ask, considering the significance of accurate boundary conditions in computational fluid dynamics, especially in the context of drag prediction, could you elaborate on any specific challenges or considerations one might encounter when defining realistic boundary conditions for different surface geometries? Additionally, how does ANSYS CFX address or mitigate these challenges to ensure accurate drag coefficient calculations?
I’m so happy to be back! Also, I love your rebrand. I’ve been following you since you were @JB. WRT your question: this is a model and our BCs are representative of those of a wind tunnel. We assume time-averted flow behaviour so we miss out on the instantaneous physics. Also, the mesh is extremely coarse and omits prism layers for wall-normal gradient capture.
@@ClimateCFD It was @jb_42 but thank you And thank you for providing insights into the simulation model, and I appreciate your explanation regarding the representation of wind tunnel boundary conditions and the considerations made for time-averaged flow behavior. Your clarification on the mesh resolution choices is also valuable. I now have a clearer understanding of the trade-offs involved in the simulation approach. I look forward to further exploring these concepts. Thank you for your time and expertise For a future video could you possibly cover multiphase flow modeling? Ta bab
@@ShropVentures would love to, pet.
@@ClimateCFDhey brother, Please make a tutorial on turbulent flow in a circular pipe with constant diameter in ansys fluent. How to mesh it with the inflation layer as well.
@@user-wr9bf7sz2d yeah, sure. Think there’s already one on the channel, but that might be CFX.
domain expansion?
Hello, what do you mean by 'domain expansion'?
thanks. exactly wat i needed.
Glad it helped!
I need a polyline only on the upper surface of the airfoil. I don’t need the polyline on the bottom surface. Is it possible to draw??
did you able to do it? im also facing the same problem.
Split the surface along the chord line when you create the geometry.
The torque results are the same How can I fix it? Thanks
did u find out
The same as what, sorry?
@@ClimateCFD every value of torque regardless of the RPM turns out to be same after we give calculate. Tried for various geomtry, flow conditions and all. Did exactly same as what you did, stll all the torque values during the parametric study is the same.
How did you made the simulation of the channel with the boat ?
Not 100% sure what you mean. It was a basic volume of fluid simulation in Ansys CFX. Let me know if you need to know anything else.
Thank You!
You’re welcome. What case are you running?
I keep getting the error "Operation would result in non-manifold bodies" when performing the boolean operation. Any advice on how to fix it?
I hope you found the issue. Normally means there would be faces that aren’t limited by edges. Difficult to say without looking at the CAD.
good one but i need geometry drawing
GrabCad
Hi and thanks for that input! I got got a question: Is it possible to get the areithmetic mean pressure of a inserted plane or smt like that and to make it an output parameter? I mean the same as you shown here with the points you created, but now with an inserted plane instead of points and with arithmetic mean pressure..
Hello, sorry this is incredibly late...but for others reading: Yes, that should be very achievable by using the area average function in expressions and then changing it into a variable.
fluidVF = if(y<fluidHt,1,0)*if(y>-0.0103[m],1,0)... Can anyone please explain what is mean of above expression?
@Climate CFD, Several years down the line this tutorial is very helpful. Im doing a simulation to determine the rotational speed of a Wells turbine, the visualization results are perfect , however when i compute the torque using the set input and output parameters, the torque values are the same. what might be the problem?
Why does the drag coefficient increase? even though you are targeting the drag coefficient to drop to 0.05
This is just a function of the optimisation algorithm. It won’t always guess correctly, but it will move towards a minima after some ‘investigation’ of the effect of parameters on the quantity in question.
Hello sir can u please share me this whole simulation file
From 14:15 I m unable to select the inside spoiler please help
Deserves more attention for how professional this was
Thanks, that's very kind.
Hi please can you do step by step exhaust fan simulation and Fan rotation animation for air We have only rpm ,we don't know how in let air velocity and out let velocity
How was the model loaded into the CFX interface?
would be a much better video if the final video wasnt cover by the TH-cam thumbnail...
Nice vid, but only 20 seconds of showing the results after a 20-minute watch, and they're covered by thumbnails for other videos!
Sir how to calculate effectiveness of heat exchanger in ansys fluent
In Analysis 'Flow Analysis 1' - Domain Interface 'Default Fluid Fluid Interface': The frame change option 'None' is only valid if the domains on each side of the interface are physically rotating with the same angular velocity. How to solve it?
I want to find rpm of savonius wind turbine on given wind speed . I also have values of mass and moment of inertia .How can I do that?
I'm trying to import "Body temperature" from Fluent to ANSYS Static Structural and ANSYS Transient Structural. But I keep getting this message. "You have a load that is not attached to any geometry. The solution cannot proceed until this is fixed." Can you help?
hi there great video, just want to know will it be possible to find the rpm using flow of air in m/s instead of mass flow rate?
Yes, no reason why not.
Hello Climate CFD! Great video. Can u kindly tell me what - (minus) sign represents here in the omegaZ values?
Just to ensure the turbine rotates the correct way.
Just to ensure the turbine rotates the correct way.
@@ClimateCFD thanks for the reply! I've another query. In the inlet you select mass flow rate , but if i want to select air velocity that possible? Should i select cartesian velocity and apply the velocity in the Z direction?
@@codexn5716 you can either select normal to the inlet of the vector for flow direction….which I think is a in this case.
Hello! this is a great video thank you very much! I am working on finding rpm for other blade designs and somehow, none of them seem to be rotating except when i try this video on your exact design of blades. Could this problem be due to the mass flow rate?
Hi Tala, Firstly thanks. Glad it helped. Shouldn’t be to do with mass flow. It’s likely to be a result of the rotating domain setting omega.
sir how can we calculate pressure drop and heat transfer coefficient in shell side in ansys. which equations will be used
Look at area average pressure at outlet - inlet.
@@ClimateCFD thank you
Hi. How do I select 'water' as the fluid?
how to set the result of the previous Ansys fluent calculation as a boundary condition input
That's going to require a proces called 'mapping'. I only have experience doing that in OpenFOAM.
Thank you! quite helpful.. do you know if we can export the data of the graphs to an excel sheet?
They can be exported to CSV using the export function in chart viewer. From there the CSV can be converted to Excel.
Thanks, cheers for the video and explanation, super useful!
You're very welcome. Glad it was helpful.