Hexagonally CNT packed?

Dear all, Does anybody simulate the hexagonally packed CNT with lammps? I want to study about water permeation through these membrane. please introduce me some papers. thanks

04 May 2019 8,502 6 View

Hydrodynamic equation for pipes junction?

Dear all, I want to know about the hydrodynamic equations for junction of pipes with non-uniform cross section. how about the Hagen-poisueille equation for these type of junctions? how could...

04 May 2019 5,741 6 View

Surface roughness in tubes?

Dear all, I want to know about defining surface roughness in tubes. I connect two tubes with different radius, for example have one smaller tube between two parts of larger tube and then increase...

02 March 2019 8,650 1 View

Problem with fix/chunk and bin/cylinder for plotting radial velocity profile?

Dear all, I want to have the velocity profile in the radial direction. I use compute chunk/atom bin/cylinder and fix chunk. but in the output , it gives me the wrong bins for radius and so zero...

10 November 2018 3,187 0 View

How to create a pore in a BN sheet?

Dear users, I simulate a boron nitride sheet and want to create a pore in this sheet. my problem is that when i create such a pore, the script gives me the error about the net charge. because...

09 October 2016 2,827 4 View

What is the relation between wetting and friction in the nanoscale?

Dear all, I want to do a research on the transport of fluids in carbon nanotubes and investigate the relation between fluid-solid friction and wetting. any paper or books in this field would be...

02 March 2016 517 1 View

How to choose the appropriate correlation parameters for calculating auto correlation function in LAMMPS?

01 February 2016 5,891 4 View

How to put water molecules with the constant density in a carbon nanotube?

Dear all, I want to calculate the density of water in cnt at 300 K and 1 atm (cnt connected to the two reservoirs of water). then as in the papers said i want to simulate a single cnt and filled...

01 February 2016 5,720 1 View

How can I calculate the Liquid/Solid friction coefficient in lammps?

Dear all, I want to calculate friction coefficient of water in cnt using Green-Kubo relation. it uses the friction force autocorrelation function, but i don't know how to define force for it....

11 December 2015 5,851 3 View

Has anyone worked on predicting the friction coefficient of water in carbon nanotubes using LAMMPS?

11 December 2015 3,501 2 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

MGL tools

20 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

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View

Is there any research regarding how training and development is going to change in the era of Fourth Industrial Revolution?

As the organizations getting prepared for the fourth industrial revolution, to enhance the skills of their workforce what type of changes are necessary and going to occur in the training and...

01 March 2021 3,199 3 View

How to define tie constraint between rigid body and another part in dynamic explicit model of Abaqus?

Hi dear researchers I connected a rigid body into the part of my structure by tie constraint and then I added displacement to rigid body, in static general step every thing is fine and these two...

28 February 2021 3,442 2 View

What is the difference between genotype and haplotype data in the ped format?

Hi everybody In the ped format for genotype, alleles of any SNP are represented by two columns (one for each allele, separated by a space). Is a column sufficient for the haplotype to...

27 February 2021 1,965 1 View