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Questions related from Rizwan Ul Hassan
If we have a hydrophoic surface with contact angle of 90 and DI water has to move bewteen parallel plates then cos90 will be 0 and how can we ammend the system?
18 January 2022 1,768 2 View
I have developed the Washburn model but my experimental results are smaller as compared to the theoretical one, but the trend is similar. When I tried to regenerate the below-mentioned paper, my...
22 June 2020 1,308 0 View
The total length of the rectangular channel is 60 mm but by model, I am getting flow length with a range of 70 mm to 260 mm from 0.1 sec to 1.2 sec respectively. The channel radius is varied from...
05 June 2020 1,379 0 View
Let suppose a system with stationary parallel plates and continuous inlet pump-driven flow is flowing between them. So, can we apply Couette flow boundary condition to poiseuille flow as the...
23 April 2020 766 0 View
I was going through the lectures about Poiseuille flow and I got curious about the governing equation of overall fluid velocity varying in 2 different conditions. 1) Poiseuille flow between...
14 April 2020 3,332 0 View
If the drop is coming out from a nozzle which hits the surface and spreads in all directions. So how can we calculate the impact velocity to go for dimensional analysis?
23 December 2019 9,665 2 View
I have successfully deposited PDMS ( 30um width and 10 um thickness line) on glass substrate but now issue is the detachment. I tried sacrificial layer of poly acrylic acid but during detachment...
15 January 2019 5,216 4 View
I am trying to print PDMS on glass surface but PDMS is spreading on glass. I have already treated hydrophobic but didn't get good results. My main aim is to get good adhesion between PDMS and...
31 December 2018 5,624 2 View
Dear all, I want to know which methods, techniques are applicable to measure the shape memory polymers properties like shape fixity and shape recovery properties?
31 May 2017 2,346 3 View
Dear members, I have a Benzyl methacrylate (monomer) and two types of crosslinkers , di(ethylene glycol) dimethacrylate (DEGDMA),poly(ethylene glycol) dimethacrylate (PEGDMA) and Carbonyl iron...
31 May 2017 9,455 3 View
Dear all, If we have 2 different shape memory polymers with different glass transition temperatures, layered one another along the thickness, then what can be expected applications? What can be...
13 April 2017 4,572 1 View
I have two polymers in resin form, hardener and softener and if I simply mix them with hand, after 30 minutes mixture is in glassy state and shows shape memory behavior. How can I get 3D printer...
28 November 2016 6,928 0 View
I was trying to find the way, whether we can make shape memory polymers by using 3-D printing techniques or not? I found four types like SLA, DLP, Multi jet/ Poly jet and CLIP to make liquid/...
09 November 2016 3,552 3 View
I ma trying to mix A(resin) and B(cross link) type polymers to get SMP. Now I am confused how to get specific proportion of mixture to get SMP? It is typically polyurethane system.
22 October 2016 8,388 5 View
I am trying to make simple SMP by physically soft and harden polymers having transition temperature 45 degree centigrade? I am unable to get final form? Can any one help me to synthesize SMP??
21 October 2016 3,907 2 View
I am trying to find out the the properties of bulk graded composites, along the thickness. Should I have to cut off the the sample and follow the hardness tests and characterization techniques?...
30 September 2016 1,789 4 View
In one of paper author draw probability density function? why it is so need for non linear analysis? Please have a look on paper figure 7...
15 July 2016 2,613 0 View
I am following one paper, where he made a phase plane diagram. Paper is totally based one experimentatal results? Can any one help me to understand the diagram? Figure 7 b in a link given...
15 July 2016 6,081 0 View
I am new and don't know exactly,what to do other than rheometer determination?
29 June 2016 8,791 2 View
