Rizwan Ul Hassan

9 Questions 5 Answers 0 Followers

Questions related from Rizwan Ul Hassan

What happens to Washburn model when contact angle is 90?

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 1,730 2 View

What should be the boundary condition for Poiseuille Flow and Couette Flow for continuous inlet flow ?

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 703 0 View

How to write Navier stokes governing equation bewteen parallel plates with pumping flow?

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 3,302 0 View

How to calculate impact velocity in fluid dynamics?

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 9,531 2 View

What type of Technique, Instrument or method can be used to measure the shape memory properties of polymer?

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 2,290 3 View

Why DMA(Dynamic mechanical analysis) results of shape memory polymers are showing odd behavior?

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 9,417 3 View

Whats can be expected applications of 2 different shape memory polymers layered one another?

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 4,542 1 View

How to find the the material properties along the thickness?

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 1,759 4 View

Is there any way to find Loss Modulus and Storage Modulus, Damping factor using experimental determined time displacement values and FFT graph ?

I am new and don't know exactly,what to do other than rheometer determination?

29 June 2016 8,761 2 View