Mesh Definition and 224 Threads

Phasor Mesh Current--what am I doing wrong?? Homework Statement Circuit diagram: Calculate the phasor mesh currents, I1 and I2. Homework Equations KVL/Mesh Current analysis with phasors/complex numbers. The Attempt at a Solution Mesh 1: (-550@0deg) + j75(I1) + 30(I1 - I2) -...

You know how a microwave oven has a mesh on the door so visible light gets through but not the microwaves? Can such a thing be done with infrared radiation too? Is it possible to block heat from getting through a mesh but not visible light?

Could someone please direct me to a good book/article that describes how to use a coarse and fine spatial mesh with the numerical method of characteristics? Thank you. Kate

[b]1.Find the voltage drop across each resistor? (I'll be able to do this after finding out the currents) I've had a go at the formulas but not sure if they're right I've never done 3 voltage sources before so the middle one is putting me off. Any help with the formulas would be great thanks.

Homework Statement Homework Equations KVL/KCL The Attempt at a Solution Meshes for; Loop 1 20 = 6i1 - 4i2 - 2i3 Loop 2 -4i1 + 18i2 - 8i3 = 0 Loop 3 2i1 + 8i2 + 6i3 +10i0 = 0 For the life of me I cannot get -5A as the answer. I have tried the following for i0; i0 = i1 - i2 i0 =...

Mesh Current: Cannot see my mistake in my approach? Homework Statement Find currents I1, I2, and I3 using Mesh Current Analysis in this circuit: Homework Equations KVL The Attempt at a Solution Initial equations: Mesh 1: -120 + 20k(I1) + 40k(I1 - I2) = 0 Mesh 2: 40k(I2 -...

FEA meshing - why not 2d mesh -> 3d mesh ? Well, I have just realized why the people do not use FEA (finite elements analysis) as often as they should do: FEA preprocessing phase is a disaster! Simply speaking - there is no simple, efficient meshing software available on the market. Existing...

Homework Statement Find the value of CSB(current source B) and determine the value of I. Homework Equations Mesh equations The Attempt at a Solution mesh: a -> Ia = 0 b -> 11Ib = -12 c -> 6Ic = 12 d -> 2Id = -8 e -> Ie = -CSB Ic = 2 A Id = -4 A then I cannot...

Homework Statement [PLAIN]http://img718.imageshack.us/img718/3519/circuith.png This is a circuit I've simulated in pSpice, I can't get the currents to match up with my hand calculations using mesh analyses. Specifically, I'm not entirely sure how to handle the current source...

Homework Statement We have been doing mesh analysis of circuits, and I am just trying to work out how to do it in a larger circuit. Homework Equations 2. Using mesh analysis work out the currents flow through each of the three meshes. From these current values calculate the voltage...

Hi guys, is there anyway i can solve the voltage across the current source using Mesh Analysis. I already solved for the voltage across the current source using Nodal analysis. And btw, do you have any tips which technique is the best to use (Kirchoff's, Mesh, Nodal analysis) for different...

HI I have a problem in ansys that made me confused...I have modeled a conceret dam and meshed it with solid 45 elements...after that I have assigned the available surface pressure on the dam to the model...in another modeling, I changed the mesh size only and analyzed the the model with the...

Hello,:smile: Actually I'm just curious to know when and where we can apply mesh and nodal analyses. Perhaps, you can help me to understand this with some simple circuit diagrams. Thanks 1: To apply nodal analysis we must have at least two nodes. Am I correct? Moreover, we also need one extra...

Homework Statement Please see the attached file for the problem statement. I am attempting to find the current across the .25 Ohm resistor. Homework Equations Using kirchhoffs voltage law I write the following equations: (1 Ohm)(2 amps) + (.25 Ohm)(2 - M1) = 0 The Attempt at a...

Hi guys, I've referenced this forum many times so now its time to join! My problem, I'm having trouble understanding Nodal and Mesh analysis (and when to use each one, and why), especially when inductors and capacitors are present. For example here is a question that was proposed to me...

hi guys I am trying to fined Vo and Io using mesh analysis for the following cct The formulas I made from the cct using mesh analysis don't seem right here is what I have- loop1 2(I1 - I2) = 0 loop2 2(I2 - I1) + I2(j4) - 3Vo = 0 loop3 3Vo + I3(-2j) = 0 and I1 = 4<-30 vo...

Hi I need a way of joining a very thin strip of stainless steel mesh to form a cylinder. It forms the 300 micron mesh cylinder that sits inside a inline "Y" type strainer. The one i have currently doesn't seem to be joined by adhesive but by a heat crimp or sum sort of non...

this question is part of my electronics CW, I've done it before, but briefly. and looking back at all my old notes I've realized that every single one I've done before has 2 sources and only 2 loops, whereas you can see from the image below that this has 3 and its getting me in quite a...

Homework Statement I am supposed to use mesh current analysis using the following circuit diagram which is in the phasor domain: Homework Equations KVL The Attempt at a Solution Let's number these meshes from left to right 1,2,3. Here is what confuses me: If take a look at...

Homework Statement The circuit shown has two inputs, V_{s} and i_{s} and one output V_{o}. The output is related to the input by the equation V_{o}=ai_{s}+bV_{s} where a and b are constants to be determined. determine the values a and b by (a) writing and solving mesh equations and (b) writing...

Homework Statement Homework Equations KCL & KVL: The Attempt at a Solution Ok folks :smile: I am not sure where to go from here. Someone suggested changing the 144V to its Thevenin equivalent, which I have done below. I know that I am supposed to apply KCL at each node...

Homework Statement Find i0 in http://images3a.snapfish.com/232323232%7Ffp73395%3Enu%3D52%3A%3A%3E379%3E256%3EWSNRCG%3D3359%3B24399347nu0mrj" using mesh current analysis. Note that the ^i1, ^i2 and ^i3 are to label my currents and show they are flowing clockwise. i0--> is the direction of the...

Homework Statement Use mesh analysis to determine i1,i2 and i3 Homework Equations The Attempt at a Solution using mesh analysis i get rid of the 3A current source and the 1ohm resistor 1) -6 + 2(i1 - i3) + 4(i2 - i3) + 8i2 = 0 2) 2(i3 -i1) + 2i3 + 4(i3 - i2) =0 3)i1 + i3 = 3...

The problem can be seen @ http://gregsomers.com/elg.jpg Depending on what way is chosen for the current going through the 50ohm resistor, there are completely different answers... how do i know which direction to choose? I.E. 50(i2-i3) for current flowing to the right OR 50(i3-i2) for...

Homework Statement Homework Equations Not necessarily any equations ,just systematic approaches for mesh current analysis like using KVL Also used cramer's rule The Attempt at a Solution My work: http://i28.photobucket.com/albums/c216/aldodesigns/page1.jpg...

Homework Statement First post here... Sorry it has to be a question. I'm currently studying electrical engineering at university. Anyway, I've hit a couple of these mesh type circuits in my workbook and have no idea how to tackle them? The question asks to solve using Thevenin's...

Basically, part of my uni course is electronics and some of the mesh current method questions involve complex numbers, mainly the use of j and other things. I would get the answer as the solution gets it down to 4-j7 and then it says this equals 8.0623<-60.2551° ......... ...< is supposed to be...

I have a plate 35mm X 35mm and is about 2mm thick. In the middle of the plate there is a round insert that is a different material that is .1mm thick and 10mm in dia. I am applying a uniform heat flux to the top flat surface for 5sec and then let it cool for another 5sec. When I look at the...

Hi, I am sure I have mistaken my DE setup or my initial conditions assumption. Homework Statement http://ivila.net/E8.png R1 will be the middle Resistor R2 the top one. Homework Equations i1' + R1/L i1 = R1/L i2 i2(R1+R2)*1/(R1) + 1/(R1*C)*integral(i2)=i1 The Attempt at a...

Does anyone have a clue on how to obtain the mesh from the ultrasound image? The region of scatterer is automatically more densely meshed than its ambient. Any software? algorithm? Thx. Elgen

What I need is a 2d mesh,user specified.I have find some solutions on net but still have problems compiling.Anyone knows wheret o find more?

Hi, I have the following circuit: [PLAIN]http://img265.imageshack.us/img265/6476/upg2.png But when i try to calculate the mesh currents i end up with the wrong answer. This is what i did: Equation for i1: 6i_1 + 18(i_1-i_2) -30 Equation for i2: 17i_2 + 18(i_2-i_1) -19 Adding currents in the...

Hi, I am trying to shade two portions of the polygon defined by the dotted line in this code. The Mesh and MeshFunction cmds seem to allot global shading only. What is the best tool to shade, say half of the aforementioned polygon? Function[{LtMarg, BotMarg, RtMarg, HVal, DVal, rVal}...

Hi, I just have a quick question about mesh convergence, hopefully someone can help. I have a model of a pipe bend that I've meshed using ABAQUS and then found the location and value of the maximum von Mises stress. I then refined the mesh a few times and plotted the max stress against the...

Hi guys, I'm using a composite trapezoidal rule to approximate the integral of functions. Up till now I have been using a uniform composite mesh, ie, there are J intervals, each interval being 1/J wide (since the integral is between 0 and 1). How do I find the most efficient non-uniform mesh...

I have installed LS Prepost beta(3.0). I was trying to work on the ball impact tutorial. I used the old to new tab to get to the GUI interface. I could find the mesh tab and gave the dimensions. It asks to then click on mesh render. I did not find any tab like mesh render. I need to know know...

I'm using anysis to model a 3-d object. I'm using a series of beams. however, when i try to mesh the beams, it says that it's unable to do that. When I add a shell, anysis meshes the model. How do I create a mesh with only beam objects?

EDIT I mean nodal, not mesh analysis xD http://img205.imageshack.us/img205/5931/omgt.jpg http://img694.imageshack.us/img694/2570/omg2p.jpg Are my are my equations correct? Here is the solution according to wolfram...

http://picasaweb.google.com/lh/photo/F1hFT0SaSpFdLqSvFA-BHA?authkey=Gv1sRgCMGC37jJtMLiXQ&feat=directlink Image : [PLAIN][PLAIN]http://picasaweb.google.com/lh/photo/F1hFT0SaSpFdLqSvFA-BHA?authkey=Gv1sRgCMGC37jJtMLiXQ&feat=directlink How do i use mesh analysis to find the current of RL? can...

Homework Statement Given the following circuit using mesh's method to solve for the power of the dependent source. Using the same circuit and using the node voltage method solve for the power of the dependent source. Circuit: Homework Equations Noting that I have to implement a...

Hello, I'm trying to figure out MESH Analysis but for the life of me I can't seem to get the Voltage polarities on the resistors right. I usually like to assign my loop currents clockwise so I can get in some sort of a routine(I know it makes no difference). Can someone please help me explain...

I understand everything up to the point which I've marked in red... Can anyone explain those few lines? I would greatly appreciate it! Thanks.

Homework Statement Hello can you tell me a story about mesh analysis in electronics.I had no knowledge in mesh analysis so can I have a minimum knowledge in this topic Homework Equations The Attempt at a Solution

Hey guys, new user here. I had a question about a project I am working on with a professor. Unfortunately he does not have much experience with fluent but is a very intelligent and experienced person when it comes to the theory. So I am basically trying to develop a chart of the power...

Hi Guys, I seem to have forgotten most of EM, but I was hoping for some help on estimating the capacitance of a wire mesh/grid parallel to a solid plane. I'm guessing that it will follow the form of a simple parallel plate (with the appropriate area factor) if the geometries are such that the...

COMSOL Rectangular mesh (VERY URGENT) I am trying to modify the mesh of a COMSOL simulation. I need to make my mesh rectangular instead of triangular that COMSOL defined already. Thanks. Engin

FEM -- mesh generator, transition elements Hello, I would like to implement 2D mesh generator. Mesh should consists of triangle and rectangle elements and those triangle elements will play a role of transition elements. The example of such mesh is here: http://pkow.pl/transition_element.jpg...

Hi. I want to make a mesh for a airfoil for i solute it with FLUENT. I must use the k-e turbulent model but i do not know how i make the mesh near the wall of airfoil. I have read that the Y plus of first cell must be within 30-300 for standard wall function. However, How can i compute the...

Homework Statement Determine I_1 I_2 I_3 When E = 15V R1 = 20k ohms R2 = 4.7k ohms R3 = 10k ohms Homework Equations KCL equation The Attempt at a Solution i tried to find using KCL.. is my equation right? Loop equation 1: EB + I3R3 + R1(I3 + I1) = 0 Loop...

Im doing mesh analysis on an AC circuit only problem is i don't know how to handle the dependant voltage source. My circuit: http://img139.imageshack.us/my.php?image=accircuitrx0.jpg I think I am supposed to just assign a value for Vo but I am not sure. Is it possible to work out what Vo...