Somen Mondal

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Questions related from Somen Mondal

Why is there no peak shifting in FTIR-ATR after the adsorption of PS-NH2 onto the NIPAAM/CMC hydrogel materials?

Why is there no peak shift in FTIR-ATR after the amine-modified polystyrene nanoplastics (PS-NH2) adsorption onto the NIPAAM/CMC hydrogel materials? I have repeated the tests, but I have gotten...

10 June 2024 8,954 6 View

What is the significance of -ve 'b' value or -ve intercept for the linear Langmuir isotherm plot??

What is the significance of the -ve 'b' value or -ve intercept for the linear Langmuir isotherm plot?? I recently plotted some of my experimental data in a Langmuir linear isotherm plot. I have...

19 May 2024 4,536 10 View

How can I measure the zeta potential of hydrogel beads?

Actually, the Zeta potential measurement instrument (Zeta Sizer, DLS method) needs the refractive index and absorbance values of the hydrogel beads. How can I measure these two parameter values...

29 March 2024 6,902 4 View

In which flow condition (Slug flow and bubbly flow), the mass transfer will be higher and why?

In which flow condition (Slug flow and bubbly flow), the mass transfer will be higher and why? The phases are aqueous and organic (liquid-liquid). Here the organic phase (lighter phase) is making...

08 July 2021 4,659 5 View

What is the effect of Bejan number on heat transfer applications?

In our case the Bejan number decreases with the increase of mass flow rate or Reynolds number of the multiphase fluids through a packed bed. However, if mass flow rate increases Nusselt number,...

28 December 2019 6,219 3 View

Higher or lower values of local entropy generation rate is desirable for the better heat transport?

Local entropy generation rate (comes from the 2nd law of thermodynamics) should be higher or lower for a heat transfer device for its better heat transport performance?

23 December 2019 5,459 3 View

Is polypropylene soluble in N N dimethyl formamide (DMF) (98.5%) to form gel so that it can be fabricated as a membrane?

I am trying to make polymeric membranes by phase inversion method. I am using N N dimethyl formamide (DMF) (98.5%) as the solvent. I have tried to make the membranes by taking polypropylene,...

15 January 2019 9,559 6 View

How can I made a conductive and flexible electrode using activated carbon powder?

I have made an activated carbon from natural precursor. Now, I just want to make an conductive electrode using that activated carbon which will be flexible. I have used Nafion binder, the...

23 August 2018 3,544 13 View

What would be the characyeristics length in Nusselt number calculations?

Nu=hL/k ; what would be the L value when the fluid is flowing through a packed rectangular channel. Is it be hydraulic diameter (dh) of the channel or particle diameter (dp) or dh/porosity of the bed?

20 April 2018 7,923 4 View