Ijaz Fazil Syed Ahmed Kabir

34 Questions 63 Answers 0 Followers

Questions related from Ijaz Fazil Syed Ahmed Kabir

How to model a phase change heat exchanger in OpenFOAM?

I need two model heat exhanger between air and water. But air will be admitted in liquid state at negative temperature and on leaving the heat exchanger it should be in gaseous state. In this...

08 June 2021 1,890 11 View

How to write a udf to define average temperature at one boundary based on the value on another boundary?

Hi all, I remember udf is used to define profile. Currently I need to 'input' the value at one boundary condition based on the value at another boundary. For example Avg...

04 May 2021 6,849 3 View

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

03 March 2021 2,397 5 View

How to rectify the miscomputation of Pressure and Continuity in HVAC CFD Simulation Using OpenFOAM?

I'm using OpenFOAM to run a CFD study of thermal comfort within a hall. I'm using OpenFOAM v1912 and BouyantBoussinesq(Simple&Pimple)Foam solver. eI have 6 inlets and outlets each with specific...

22 December 2020 1,495 3 View

How to model a fan with specific mass flow rate in OpenFOAM?

I have been working on fan boundary condition in ANSYS FLUENT. If I'm not wrong I remember providing pressure jump based on axial velocity and in addition tangential and radial velocity...

21 May 2020 4,786 0 View

Which CAD software is more user friendly for creating complex geometry using python code?

Dear all i'm using salome to create geometry for openfoam simulation. I'm planning to write a python script to generate complex geometry. I also noticed that blender is also based on python script...

19 March 2020 4,663 3 View

Can the set up files created for openfoam v4.0 (from .org) can be used for openfoam 1906 (from .com)?

I noticed that openfoam software is provided by two different organisations 1. ESI group 2. OpenFOAM foundation. My doubt is if the cases are set based on the version provided by openfoam...

08 January 2020 239 2 View

How to Model the angle of rain to determine the effect of airfoil aerodynamics?

I'm trying to model the rainfall effect on airfoil aerodynamics. I noticed in few papers, injector is placed upstream of airfoil which means air and rain travels in same direction and also in same...

11 November 2019 3,889 3 View

Which latest version of openfoam is good with better results and technical support (one by ESI-OpenCFD and one by OpenFOAM Foundation ).?

I wish to know which version of openfoam is good and get good technical support. I'm currently using OpenFOAM 6 and use interFOAM. I'm trying to analyse the flow from a multiple pipe connecting...

26 September 2019 6,662 3 View

Why the flow direction seems fixed along 'x' axis in OpenFOAM 6 (I apologise I found no issues with velocity compoent)?

I recently updated my OpenFOAM version 4.0 to 6. I'm facing an issue in the direction of flow. My flow is always pointing in x direction. Hence I tried to change the flow axis in a tutorial...

25 September 2019 886 1 View

Is just the pressure raise on closing the valve causes water hammering?

I recently saw this lecture from NPTEL on water hammering. I suppose example used for explaining the wave motion is widely used. (flow from a reservoir and valve...

07 August 2019 2,660 3 View

Does the speaker develops sound in all frequencies or only particular frequency?

Hi I need to model PA system for a train station with EASE. I got this doubt, while a speaker makes announcement, sound from it have all frequencies or it will be at one particular...

26 July 2019 5,529 9 View

What is the relationship between electric power and sound power?

Sound Power Level of a speaker is computed from the sound power of the speaker. Sound power from the speaker is the total sound energy emitted by a speaker per unit time. How this sound power is...

25 July 2019 8,799 3 View

How to set BC for "Phi" for initiliasing via potentialfoam ?

Hi everyone, I'm running a simulation using interFOAM. Since my domain is big, I face issue in initialisation. I read potentialfoam can be used to initialise the velocity and pressure field. I'm...

21 August 2018 5,858 3 View

What is the difference between inletoutlet BC and Freestream BC?

Hi In OpenFOAM, How freestream BC is unique compared to inletoutlet BC. Bcz in both these BCs, if the flow is outflow, it becomes zerogradient and if there is any inflow, we have to specify the...

13 August 2018 6,965 3 View

Does the pipe roughness increase with age due to very high turbulent flow?

Hi i'm doing an analysis on pipe flow where the initial design of pipe mention that friction factor to be 0.015 around, but when I apply Bernoulli's equation based on the two points measurement, I...

01 August 2018 1,495 5 View

How to set up domain for cfx non premixed combustion modelling?

Hi all I'm trying to remodel pool fire modelling based on this paper "LNG pool fire simulation for domino effect analysis"...

11 December 2017 1,462 2 View

How to find pollutant emission rate based on fuel consumption rate?

Hi I need to know emission rate of each pollutant from a fuel. I'm provided with fuel consumption rate over an in year in MT/year.

06 April 2017 781 6 View

How to set OUTFLOW boundary condition in ANSYS FLUENT using TUI?

Hi I need to know how to set boundary condition outflow using TUI for zone name outlet

12 February 2016 7,939 3 View

Why there is a difference between torque for measured and estimated torque from pressure measurement in Wind turbine?

Hi, I'm using NREL Phase VI turbine for my analysis. I noticed that UAE has provided two torque values, one estimated torque (from pressure measurement along different sections) and another...

14 December 2015 3,483 4 View

How can I interpret 2 UDFs in FlUENT?

HI I have written seperate UDFs for velocity inlet, One for velocity profile and another for Turbulent Kinetic energy. But while I try to interpret both udfs, only last udf exist, previous one...

18 June 2015 5,562 7 View

How can I compile or interpret UDF in FLUENT journal file for running in HPC?

I have created UDF code I would like to intrepet in HPC.

22 May 2015 1,567 9 View

What is the difference between the real time wind turbine and in wind tunnel?

Hi I'm doing wind turbine analysis on NREL Phase VI turbine using ANSYS Fluent. So it is based on wind tunnel experiment inwhich blade RPM is fixed. But what about real case, in which rotation of...

13 May 2015 9,107 5 View

How can I calculate the normal force and tangetial force on an airfoil in CFD Post?

Not in FLUENT Angle of attack is not known? Just need to know the normal force and tangetial force from which aoa has to be calculated

04 May 2015 697 7 View

Any suggestions regarding turbulent intensity in the atmospheric boundary layer in wind turbine simulation?

Currently I'm working on varying the turbulent intensity at the inlet to find the wake recovery. I read that at high turbulent intensity wake recovery will be faster. So I varied the turbulent...

28 April 2015 6,326 22 View

How can one find the actual time taken for simulation in ANSYS FLUENT?

I have run a sliding mesh analysis of wind turbine. It took almost a month to run the simulation. Where I can find the total time for that simulation?

09 March 2015 3,626 18 View

Is anyone familiar with multiple porous media inside a domain?

HiI'm modelling windturbine using porous jump boundary condition. I assumed the turbine to be a disk and disk is divided into concentric rings. For each ring pressure drop is found and is related...

07 October 2014 3,030 2 View

How can I use Pressure Jump (Or porous) boundary conditions for Actuator Disk Modelling of Wind turbine in FLUENT?

Hi Im trying to combine Actuator disk theory with CFD. I found two options Either to add source term to momentum equation or use pressure jump boundary condition. (fan boundary). Can anyone...

09 September 2014 10,010 5 View

How can I carry out animation of wake behind the blades?

I'm running a sliding mesh analysis of wind turbine in FLUENT, and I need to do animation of the wind turbine. I need to animate the wake behind the blades. I know I have to do calculation...

20 May 2014 2,812 3 View

How can I show the vorticity developed from the wind turbine in the CFD Post (ANSYS or FLUENT)?

I have done a MRF and Sliding mesh analysis of the wind turbine. I need to know how to show the vorticity (wake) created behind the turbine.

10 March 2014 2,915 16 View

Regarding number of processor in openfoam simulation with 1 RAM

Dear all, I have workstation 32GB, (4*8), 4 RAM sockets and each RAM is 8 GB System monitor shows 8 CPU ( I think each core is divided in to 2 threads), whenever I try to run the simulation in...

01 January 1970 1,248 3 View

How to differentiate and enter the value of kappa, kappamethod, kappaname in OpenFOAM Heat transfer Analysis?

HI I understood Kappa means thermal conductivity but if I enter any value for it, simulation results in error before starting. So I have to use fluidthermo. For Kappamethod, I have to chose...

01 January 1970 1,550 3 View

Is turbulentHeatFluxTemperature Boundary condition no more both in Openfoam.org and Openfoam.com?

Hi Im working on cooling analyses and need to define the heat load as openfoam BC. I used fixed gradient (q/K)=(dt/dx) And also externalwallheatflux I also read that this BC...

01 January 1970 3,777 5 View

Regarding mappedpatch inlet for wallboiling tutorial from reactingTwoPhaseEulerFoam

Hello, I'm currently researching the phase change of water as heat is applied to a surface. My work is comparable to the wallboiling tutorial...

01 January 1970 9,401 0 View