How does an archaeologist think?

Every profession has its own way of how to solve a problem (see my article https://www.researchgate.net/publication/319644185_Thinking_like_an_engineer and my question...

11 December 2019 10,019 10 View

How to think like Sherlock Holmes?

The sheer number of publications and their breadth make it impossible to keep up and to know a little bit about everything. We are forced to be selective or to read scantly. Sherlock Holmes a...

02 March 2019 7,574 25 View

What does an engineer do? Alternatively, what is engineering?

It has been said scientists investigate what which already exists; Engineers create what which has never been. I am pondering the question "What is engineering?" It has been said that engineers...

01 February 2019 4,401 14 View

What is an acceptable (i.e. tolerable) failure rate for water main pipeline?

A key consideration in the design of a natural gas transmission pipeline is the location class of the pipeline. The location class is a geographic area along the pipeline classified primarily...

10 November 2018 4,776 3 View

What engineers know and how they know it?

10 November 2018 7,659 9 View

Which should come first at the university, teaching or research?

Fifty years ago if you had a problem you would run to the head of your department as she/he knew all. Industry and government agencies used to wheel them in when there was a problem; but not now....

09 October 2018 9,550 2 View

How you do the fracture mechanics or X-FEM analysis in Abaqus if you only have an input file (no CAE file)?

I have an Abaqus input file of a complex model. It is very time-consuming to create a CAE model. I am wondering how crack definition can be added to the input file. Material id gray cast iron and...

08 September 2018 7,842 5 View

How do you determine the Remaining Useful Life (RUL) of cast iron water mains?

In some cities water mains are made of grey cast iron and may be 150 year old. Some of these pipe show sign of distress in the form of corrosion. These are huge assets and cannot be replaced...

08 September 2018 7,940 0 View

Is there a validated diagnostic and prognostic of cast iron penstock valve for water mains?

Many big cities established their water supply and sewer systems very early during the last century. Many of the penstocks and pressure conduits are over 50 years old. Corrosion and erosion have...

08 September 2018 9,539 1 View

What is an engineering judgment?

02 March 2018 6,016 10 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

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 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

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 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

What thickness need for ITO to use as conductive layer?

I want to do RF sputtering of ITO on glass substrate using magnetron sputtering. what thickness do i need to make it good conductive layer to use it for PSC. Moreover, whats about thickness of...

01 March 2021 395 3 View