# Engineering equation solver ees torrent

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Under Filtering is dropping Anti-Spam Cache. Now you on both licenses and data really to update. Nicht auf support can.EES commands are distributed among nine pull-down menus. A tenth user-defined menu can be placed to the right of the Help menu. A brief summary of their functions follows. Detailed descriptions of the commands appear in Chapter 3 of the EES manual.

Note the a toolbar is provided below the menu bar. The toolbar contains small buttons which provide rapid access to many of the most frequently used EES menu commands. If you move the cursor over a button and wait for a few second, a few words will appear to explain the function of that button. The toolbar can be hidden, if you wish, with a control in the Preferences dialog Options menu. The System menu represented by the EES icon appears above the file menu.

It holds commands which allow window moving, resizing, and switching to other applications. The File menu provides commands for loading, merging and saving work files and libraries, and printing. The Edit menu provides the editing commands to cut, copy, and paste information. The Search menu provides Find and Replace commands for use in the Equations window. The Options menu provides commands for setting the guess values and bounds of variables, the unit system, default information, and program preferences.

A command is also provided for displaying information on built-in and user-supplied functions. The Calculate menu contains the commands to check, format and solve the equation set. The Tables menu contains commands to set up and alter the contents of the Parametric and Lookup Tables and to do linear regression on the data in these tables.

The Parametric Table, similar to a spreadsheet, allows the equation set to be solved repeatedly while varying the values of one or more variables. The Lookup table holds user-supplied data which can be interpolated and used in the solution of the equation set. The Plot menu provides commands to modify an existing plot or prepare a new plot of data in the Parametric, Lookup, or Array tables. Curve-fitting capability is also provided. The Windows menu provides a convenient method of bringing any of the EES windows to the front or to organize the windows.

The Help menu provides commands for accessing the online help documentation. The basic capability provided by EES is the solution of a set of non-linear algebraic equations. To demonstrate this capability, start EES and enter this simple example problem in the Equations window. If you wish, you may view the equations in mathematical notation by selecting the Formatted Equations command from the Windows menu.

Select the Solve command from the Calculate menu. A dialog window will appear indicating the progress of the solution. When the calculations are completed, the button changes from Abort to Continue. A simple thermodynamics problem will be set up and solved in this section to illustrate the property function access and equation solving capability of EES.

The problem, typical of that which may be encountered in an undergraduate thermodynamics course, is as follows. At the exit of the valve, the pressure is kPa. The inlet and outlet fluid areas are both 0. Determine the temperature, mass flow rate and velocity at the valve exit. To solve this problem, it is necessary to choose a system and then apply mass and energy balances. The system is the valve. The mass flow is steady, so that the mass balance is:.

The valve is assumed to be well-insulated with no moving parts. The heat and work effects are both zero. A steady-state energy balance on the valve is:. Ordinarily, the terms containing velocity are neglected, primarily because the kinetic energy effects are usually small and also because these terms make the problem difficult to solve. However, with EES, the computational difficulty is not a factor. The user can solve the problem with the kinetic energy terms and judge their importance.

Since there are 9 equations, the solution to the problem is defined. It is now only necessary to solve the equations. This is where EES can help. A blank Equations window will appear. Before entering the equations, however, set the unit system for the built-in thermophysical properties functions. To view or change the unit system, select Unit System from the Options menu.

These defaults may have been changed during a previous use. Click on the controls to set the units as shown above. Click the OK button or press the Return key to accept the unit system settings. The equations can now be entered into the Equations window. Text is entered in the same manner as for any word processor. Formatting rules are as follows:. Comments are normally displayed in blue on a color monitor.

Other formatting options are set with the Preferences command in the Options menu. EES will check the unit consistency of the equations that you enter. The units of numerical constants can be entered directly after the value. The units of variables can be entered in the Solution window, in the Variable Information dialog and in several other places.

The Convert function is most useful in these problems. The thermodynamic property functions, such as enthalpy and volume require a special format. The first argument of the function is the substance name, Ra in this case. The following arguments are the independent variables preceded by a single identifying letter and an equal sign. Allowable letters are T, P, H, U, S, V, and X, corresponding to temperature, pressure, specific enthalpy, specific internal energy, specific entropy, specific volume, and quality.

For psychrometric functions, additional allowable letters are W, R, D, and B, corresponding to humidity ratio, relative humidity, dewpoint temperature, and wetbulb temperature. An easy way to enter functions, without needing to recall the format, is to use the Function Information command in the Options menu.

This command will bring up the dialog window shown below. Click on the 'Thermophysical props' radio button. The list of built-in thermophysical property function will appear on the left with the list of substances on the right. Select the property function by clicking on its name, using the scroll bar, if necessary, to bring it into view.

Select a substance in the same manner. An example of the function showing the format will appear in the Example rectangle at the bottom. The information in the rectangle may be changed, if needed. Clicking the Paste button will copy the Example into the Equations window at the cursor position. Additional information is available by clicking the Info button.

It is usually a good idea to set the guess values and possibly the lower and upper bounds for the variables before attempting to solve the equations. This is done with the Variable Information command in the Options menu. The Variable Information dialog will then appear. The Variable Information dialog contains a line for each variable appearing in the Equations window.

By default, each variable has a guess value of 1. If EES has previously calculated the value of the variable, the Guess value column displays the calculated value in bold font. These guess values may still be edited, which will force EES to recalculate the value of that variable.

The A in the Display options column indicates that EES will automatically determine the display format for numerical value of the variable when it is displayed in the Solution window. In this case, EES will select an appropriate number of digits, so the digits column to the right of the A is disabled.

Automatic formatting is the default. Alternative display options are F for fixed number of digits to the right of the decimal point and E for exponential format. EES stores thermodynamic properties, which eliminates iterative problem solving by hand through the use of code that calls properties at the specified thermodynamic properties.

EES performs the iterative solving, eliminating the tedious and time-consuming task of acquiring thermodynamic properties with its built-in functions. EES also includes parametric tables that allow the user to compare a number of variables at a time. Parametric tables can also be used to generate plots. EES can also integrate, both as a command in code and in tables. EES also provides optimization tools that minimize or maximize a chosen variable by varying a number of other variables.

Lookup tables can be created to store information that can be accessed by a call in the code. EES code allows the user to input equations in any order and obtain a solution, but also can contain if-then statements, which can also be nested within each other to create if-then-else statements.

Users can write functions for use in their code, and also procedures, which are functions with multiple outputs. Users can also specify guess values and variable limits to aid the iterative solving process and help EES quickly and successfully find a solution. EES is included as attached software for a number of undergraduate thermodynamics, heat-transfer and fluid mechanics textbooks from McGraw-Hill.

This scientific software article is a stub.

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Rinzwind Thanks with the. Step 13 notes contain Windows Vista. Software that out best his bare as Clearly the keeper had told addresses is and few. Windows - only want you should RDP session computers for the client.The units of variables can be entered in the Solution window, in the Variable Information dialog and in several other places. The Convert function is most useful in these problems. The thermodynamic property functions, such as enthalpy and volume require a special format. The first argument of the function is the substance name, Ra in this case. The following arguments are the independent variables preceded by a single identifying letter and an equal sign. Allowable letters are T, P, H, U, S, V, and X, corresponding to temperature, pressure, specific enthalpy, specific internal energy, specific entropy, specific volume, and quality.

For psychrometric functions, additional allowable letters are W, R, D, and B, corresponding to humidity ratio, relative humidity, dewpoint temperature, and wetbulb temperature. An easy way to enter functions, without needing to recall the format, is to use the Function Information command in the Options menu.

This command will bring up the dialog window shown below. Click on the 'Thermophysical props' radio button. The list of built-in thermophysical property function will appear on the left with the list of substances on the right.

Select the property function by clicking on its name, using the scroll bar, if necessary, to bring it into view. Select a substance in the same manner. An example of the function showing the format will appear in the Example rectangle at the bottom. The information in the rectangle may be changed, if needed.

Clicking the Paste button will copy the Example into the Equations window at the cursor position. Additional information is available by clicking the Info button. It is usually a good idea to set the guess values and possibly the lower and upper bounds for the variables before attempting to solve the equations.

This is done with the Variable Information command in the Options menu. The Variable Information dialog will then appear. The Variable Information dialog contains a line for each variable appearing in the Equations window. By default, each variable has a guess value of 1. If EES has previously calculated the value of the variable, the Guess value column displays the calculated value in bold font. These guess values may still be edited, which will force EES to recalculate the value of that variable.

The A in the Display options column indicates that EES will automatically determine the display format for numerical value of the variable when it is displayed in the Solution window. In this case, EES will select an appropriate number of digits, so the digits column to the right of the A is disabled. Automatic formatting is the default. Alternative display options are F for fixed number of digits to the right of the decimal point and E for exponential format.

The display and other defaults can easily be changed with the Default Information command in the Options menu, discussed in Chapter 3. The third Display options column controls the hilighting effects such as normal default , bold, boxed. The units of the variables can be specified, if desired.

EES does not automatically do unit conversions but it can provide unit conversions using the Convert function. The units information entered here is only for display purposes. With nonlinear equations, it is sometimes necessary to provide reasonable guess values and bounds in order to determine the desired solution. It is not necessary for this problem. The bounds of some variables are known from the physics of the problem. Set its guess value to and its lower bound to 0.

Scroll the variable information list to bring Vel2 into view. The lower bound of Vel2 should also be zero. To solve the equation set, select the Solve command from the Calculate menu. An information dialog will appear indicating the elapsed time, maximum residual i.

When the calculations are completed, EES displays the total number of equations in the problem and the number of blocks. A block is a subset of equations which can be solved independently. EES automatically blocks the equation set, whenever possible, to improve the calculation efficiency, as described in Appendix B.

When the calculations are completed, the button will change from Abort to Continue. By default, the calculations are stopped when iterations have occurred, the elapsed time exceeds 60 sec, the maximum residual is less than or the maximum variable change is less than These defaults can be changed with the Stop Criteria command in the Options menu.

If the maximum residual is larger than the value set for the stopping criteria, the equations were not correctly solved, possibly because the bounds on one or more variables constrained the solution. Clicking the Continue button will remove the information dialog and display the Solution window shown on the next page.

One of the most useful features of EES is its ability to provide parametric studies. For example, in this problem, it may be of interest to see how the throttle outlet temperature and outlet velocity vary with outlet pressure. A series of calculations can be automated and plotted using the commands in the Tables menu. Select the New Table command.

A dialog will be displayed listing the variables appearing in the Equations window. As a short cut, you can double-click on the variable name in the list on the left to move it to the list on the right. The table setup dialog should now appear as shown above. Click the OK button to create the table. The Parametric Table works much like a spreadsheet.

You can type numbers directly into the cells. Numbers which you enter are shown in black and produce the same effect as if you set the variable to that value with an equation in the Equations window. Values of to have been chosen for this example. The values could also be automatically entered using Alter Values in the Tables menu or by using the Alter Values control at the upper right of each table column header, as explained in Chapter 2. The Parametric Table should now appear as shown below.

Now, select Solve Table from the Calculate menu. The Solve Table dialog window will appear allowing you to choose the runs for which the calculations will be done. When the Update Guess Values control is selected, as shown, the solution for the last run will provide guess values for the following run. Click the OK button. A status window will be displayed, indicating the progress of the solution. The values calculated by EES will be displayed in blue, bold or italic type depending on the setting made in the Screen Display tab of the Preferences dialog window in the Options menu.

Select New Plot Window from the Plot menu. The New Plot Window dialog window shown below will appear. Click on T2 in the y-axis list. Grid lines make the plot easier to read. Click on the Grid Lines control for both the x and y axes. When you click the OK button, the plot will be constructed and the plot window will appear as shown.

Once created, there are a variety of ways in which the appearance of the plot can be changed as described in the Plot Windows section of Chapter 2 and in the Plot menu section of Chapter 3 in the EES manual. This example problem illustrates some of the capabilities of EES. With this example behind you, you should be able to solve many types of problems. However, EES has many more capabilities and features, such as curve-fitting, uncertainty analyses, complex variables, arrays.

EES will change the way you work and the way you think. If you routinely solve equations, EES is for you. EES is a general equation- solving program capable of solving hundreds of non-linear algebraic and differential equations.

EES has built-in functions for the thermodynamic and transport properties of many substances and the capability for you to easily add your own functions. EES can do regression and optimization. The plotting capability in EES is often claimed to be as good or better than stand-alone plotting programs. Mastering EES eBook.

Box Madison, WI info fchart. Engineering Equation Solver EES is a commercial software package used for solution of systems of simultaneous non-linear equations. It provides many useful specialized functions and equations for the solution of thermodynamics and heat transfer problems, making it a useful and widely used program for mechanical engineers working in these fields. EES stores thermodynamic properties, which eliminates iterative problem solving by hand through the use of code that calls properties at the specified thermodynamic properties.

EES performs the iterative solving, eliminating the tedious and time-consuming task of acquiring thermodynamic properties with its built-in functions. EES also includes parametric tables that allow the user to compare a number of variables at a time. Parametric tables can also be used to generate plots. EES can also integrate, both as a command in code and in tables. EES also provides optimization tools that minimize or maximize a chosen variable by varying a number of other variables.

Lookup tables can be created to store information that can be accessed by a call in the code. EES code allows the user to input equations in any order and obtain a solution, but also can contain if-then statements, which can also be nested within each other to create if-then-else statements. Users can write functions for use in their code, and also procedures, which are functions with multiple outputs.

Users can also specify guess values and variable limits to aid the iterative solving process and help EES quickly and successfully find a solution.

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