Recent content by Aun Muhammad

All that you have pointed out is correct. For the plotted graph which one is true? 1. The air velocity in the tunnel is constant while the angular velocity of the blades is changed 2. The angular velocity is fixed while the air velocity is changed 3. Both are changed? I assumed point 1 to be...

Hello @Baluncore. How can I determine the incoming velocity and the rotational speed for the case highlighted as a blue spot in the diagram below. The results for the experiment have been presented in a non-dimensionalized format as you are already aware perhaps. Some facts mentioned in the...

Thanks a lot. Much appreciated.

Friends, I'm not investigating the single-rotation case. I'm more interested in the dual-rotation cases. For the dual-rotation case, the fore and aft props are left and right handed as stated in the report. Which implies that they are counter-rotating. Hence, what I have been able to...

Sure. This paper is for four- and six-bladed props but with identical test conditions. https://ntrs.nasa.gov/search.jsp?R=19930091825

I agree. Also, in the description, it says that the front leads the rear for the single-rotation test. P.S. The excerpt from the article has been added as it is.

Thanks for your reply. The props are counter-rotating.

Hoping that someone can explain what the optimum angular displacement between the front and rear propellers actually means here in the following paragraph. It concerns the single-rotation case of the experiment: "Both the eight-blade single- and dual-rotating propellers were mounted in four-way...

The question is that what must be an appropriate 'reflective boundary condition' at the wall to simulate the reflection of the shallow water wave?

Hey everyone, I’m trying to simulate a 1D Shallow Water wave in FORTRAN using the Lax Wendroff Method. The case is fairly simple. I have a wave generator on one end of a water pool and a wall boundary on another. The waves start traveling towards the wall and are ‘reflected off’ the wall. The...

Thank you for your reply. I've changed the value from single to double precision as you stated. But could you please reiterate what the formula attached below actually means? In my understanding, Omega, or w, is being varied from 1 to 2 with a step-size of 0.002. This makes 501 iterations. For...

What you are suggesting seems plausible. The results however must display a general trend similar to the desired result. The Error must decrease, reach a minima and then begin to increase again. Sadly that is not true in my case.

I've made the necessary changes. However, the results are still the same. I'm plotting 'omega' versus 'logError'. I'm unable to find wopt(optimum) from the graph. The blue-lined graph below shows my results. The red-lined graph is the desired output.

Hey everyone. I've attached a code I have written in FORTRAN implementing the SOR Method for a 2 D Laplace Equation. Subroutines have been created, grid has been created and initial and BC's applied appropriately. While computing the error of each iteration, I am unable to achieve the desired...

Hey everyone. Introducing myself here. My name is Muhammad. I'm an Aerospace Engineer. A Masters Student currently. Feels great to join here. Thanks.