Thermally fully developed flow in ducts?

Hello dear friends Can we assume thermally fully developed flow for a flow in a duct with constant wall temperature? It is assumed there is transient energy equation that means temperature varies...

02 March 2018 1,943 1 View

Thermally fully developed in internal flow?

Hello dear friends What is the conditions that we can assume that we have thermally fully developed flow for both laminar and turbulent flows? I mean can we assume that we have thermally fully...

10 November 2017 8,745 8 View

Finned channel VS. simple channel?

Hello dear friends There is two channels that one of them is finned and another one is simple and without fin(as attached file). The fluid mass flow rates and inlet fluid temperatures in both...

10 November 2017 5,540 7 View

Borehole Wall Temperature?

Hello dear researchers How can I calculate ground temperature and after that how can I find temperature distribution along borehole wall? kind regards

02 March 2017 2,104 0 View

Solving Partial Differential Equation(PDE)?

Hello dear friends I have a PDE problem(attached file) with its boundary and initial conditions. Could you please give me your opinion and methods about solving it?

02 March 2017 2,363 53 View

Solar irradiatio calculation problem?

hi friends The attached file is MATLAB code for solar irradiation on tilted surface. Why for latitude=60 and surface angle=60, total irradiation at the night (e. g. 1 or 2), is positive but it...

31 December 2016 9,902 0 View

Neural Network-MATLAB?

09 October 2016 9,891 1 View

Any suggestion on the pressure and velocity Probe situation?

what should be the flow situation for locating pressure and velocity probe? I mean what should be the boundary layer situation for having the best place to locate these probes? regards

01 February 2015 5,331 5 View

Can anyone help with a problem in ANSYS ICEM?

I have modeled my geometry and blocked it in ICEM as attached file. The problem is that I cannot have a good meshing since determinant 2*2*2 says.

04 May 2014 3,283 12 View

What are the best boundary conditions that I should impose in inlet and outlet for modelling a compressible flow in a pipe?

I want to model a compressible flow with Ma~0.8 in a pipe in ANSYS CFX.

02 March 2014 5,760 3 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View