Ibrahim O. Elhagali

13 Questions 16 Answers 0 Followers

Questions related from Ibrahim O. Elhagali

Is the output of a digital-to-analog converter (4-20 mA) dependent on the shape of the input wave, or just the frequency?

I have a turbine flowmeter giving a frequency output (-5 : 5 V) with a wave shape as in the figure attached. This signal is fed to a Digital-to-analog converter to give a 4-20 mA signal to feed to...

31 July 2020 6,052 6 View

Can I get a substrate coated (using spray technique) with a 200 micron Nichrome film over an area of 10 cm^2 for less than 500 US dollars?

I want to get a resistive heater fabricated using spray coating technique for afordable price.

02 March 2020 7,014 8 View

Is there any adhesive material to attach stainless steel foil to Alumina substrate at high temperature ?

I am trying to fabricate a resistive heater from Nichrome foil on an Alumina substrate, that will give a very high heat flux around 500 w/cm^2, which may cause delamination of the foil or bad...

29 February 2020 1,824 9 View

What is the cheap solutions to get an Alumina substrate coated with Nichrome sub-millimeter layer (on the order of 100 micrometer) ?

please suggest names of companies that can do this, or even a process that i can go through in lab.

29 February 2020 2,970 5 View

Can saline water be used to cool the photo voltaic modules?

You know that cooling of the PV modules helps increase the efficiency, but can we use saline (salty) water in this process without having any harmful effects to the modules? note that the saline...

12 April 2019 9,853 10 View

I want to access a workstation to make ANSYS simulations, can you help?

access to a workstation

30 December 2018 2,498 3 View

I want to validate the simulation of flow around NACA 0012 using drag and lift coef how to extract raw Data from the paper?

NACA0012

30 December 2018 7,808 3 View

Which programs can be used to collect all these velocity profiles in the same figure?

I want to add velocity profiles as shown in the figure, at each location in in x direction i want to plot the velocity profile (velocity VS y coordinate)

13 October 2018 3,647 8 View

What is least pressure of the compressed water so that fresh water can be produced?

in the figure attached the desalination system does not operate on a continuous basis, but a force is applied to the diaphragm to induce pressure on the saline water. i want to know the minimum...

20 October 2016 6,610 3 View

Why the step circled in the picture found in almost seaplanes ? does this step cause aerodynamic difficiency after take-off?

i want to know the reason why all flying boats and amphibious planes share this step in the hull, whether they have any side effects on aerodynamic performance.

20 October 2016 3,432 6 View

What is the least pressure you have heard about in reverse osmosis desalination?

i am making a prototype for RO desalination system and want to know the least pressure for effective freshh water production, and at that pressure what is the flow rate per unit area of the...

18 October 2016 8,250 3 View

What is the thickness and material to be used, and how to fix the glass ?

the tank has a pressure of 0.1 absolute and contained with water, i want to determine the thickness and type of material. the glass part to show water level is to be fixed, what fixing...

02 October 2016 1,522 0 View

Which of the two shapes has the higher drag (pressure and visous)?

in the attached figure there two shapes of the same main dimensions but a slight difference is made to the nose of the first to be more like a dolphin nose, imagine the revolved 3D shape, and i...

11 July 2016 1,063 12 View