How can I apply Differential Quadrature method to solve a fourth order differential equation?

I am trying to solve the free vibration of a cantilever beam. I am attaching a word document in which I have given the progress of my work. I am not able to converge to fundamental frequency. I...

01 February 2015 2,269 28 View

How to decide upon the nature of grid points to be selected in Differential Quadrature method?

31 December 2014 9,033 4 View

How are the boundary conditions incorporated while using the Differential Quadrature method?

When dealing with 2-D Laplace equation how is Differential quadrature method applied to get the solution. How are the four boundary conditions incorporated into the formulation?

11 December 2014 910 12 View

What is numerical oscillation and what are the main cause of this phenomenon.?

I performed a Ritz analysis on 1-D Laplace equation and my results are diverging from the exact results. So is numerical oscillation is the only cause or can it be because of any other reason?

08 September 2014 3,538 6 View

What is the significance of Laplace and Poisson equations in Mechanical Engineering?

Please help me with an example other than the heat transfer case. Also help me where exactly can we use Laplace or poisson 's equation.

06 July 2014 2,187 15 View

What is a thin-walled beam? What are their advantages compared to normal beams?

I know a thin walled beam is the one in which the length is one order more than other crossectional dimensions. Please explain why it is widely used over other beams?

06 July 2014 3,065 5 View

What is the difference between Rayleigh-Ritz method and Ritz method?

I know Ritz method is applied directly to the variational formulation. Basically what makes the Ritz method unique?

06 July 2014 6,234 10 View

Can someone help me to get the Paper authored by Walter Ritz in 1909 and 1908?

The paper is available in German but I couldn't find an English translation of the same. If possible please suggest me a link.

06 July 2014 8,810 0 View

Where is the differential quadrature method best used? Can someone suggest good introductory material on this method?

I am new to this method. I have a basic idea about the RItz method. Please suggest a good introductory material for this topic.

05 June 2014 6,939 2 View

Can some one help me out with the L operator of a linear differential equation?

Lu=d2u(x)/dx2. What is the meaning of this expression? The R.H.S is a second order derivative.

05 June 2014 3,483 1 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

What techniques can I use to determine the miscibility of polymer blends?

The term miscibility refers to the single-phase state in thermodynamics. I do not mean the compatibility of different components. To determine the miscibility I know several techniques such as...

03 March 2021 4,107 4 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 View

Is there a powerful system for the security of the systems distributed on IoT systems?

Is there a powerful system for the security of the systems distributed on IoT systems?

02 March 2021 3,858 10 View