
Re: How to add the boundary condition
Tomasz Wroblewski Aug 27, 2010 3:25 AM (in response to Devi Prasad Samal)Hi Devi
If is just only storage tank try first floXpress , outletCondition and inletCondition, this is a Buondary Condition.
SW Help (F1) Find in contents Solidworks FloXpress. After that you can pass data to Flow Simulation, without problem. Sometimes floXpress is enough
Re: How to add the boundary condition
Devi Prasad Samal Aug 28, 2010 4:50 AM (in response to Tomasz Wroblewski)Hi Tomasz,
May be my posting did not clear what i want?
actually i want to apply the weight of water in the storage tank. and with non uniform distribution... but how to do it?
if my density of water is 100kg/m3, then how much pressure i have to aplly in the surface of storage tank.
and what equation should i use to apply nonuniform pressure across the storage tank

Re: How to add the boundary condition
Ahmad Bakir Aug 28, 2010 7:16 AM (in response to Devi Prasad Samal)Hi Devi
The pressure distribution with liquid as we know is linear like th form:
P = 9.81 * density * H (if the tank is opened to atm pressure).
so you can easily find out the pressure value at the base of tank by using the equation above. But why you need to load the Tank with nonlinear pressure?
 Do you need to simulate other material like soil or wheat maybe?

Re: How to add the boundary condition
Tomasz Wroblewski Aug 28, 2010 7:23 AM (in response to Ahmad Bakir)Devi
If I understand good, to check the tank (for deformation by the pressure and weight of water) you have to use SW Simulation with different types of simulations  Static
Nonlinear or Outher and finally all these simulation or combinations thereof can be added to pressure vessel design simulation
Re: How to add the boundary condition
Devi Prasad Samal Jan 28, 2011 1:13 AM (in response to Tomasz Wroblewski)Thanks for all of your suggestion...
Besides tomasz i think you understand my problem...i have to go for all the studies which u mentioned.
but before that i want to know how to add a non uniform pressure distribution to the tank....my tank is not cylinder is a jug like shape.
My question is for applying a non uniform distri bution of water we required a equation & a coordinate .
So ijust want to know how to define a water's pressure distribution over a tank.
if u can uploaded a model with proper load distribution, it really helps
Thanks

Re: How to add the boundary condition
Jacob Kuruvilla Thomas Jan 28, 2011 8:31 AM (in response to Devi Prasad Samal)The pressure distribution inside a vessel / tank will be uniformly distributed with 0 at the top and maximum at the bottom. teh pressure at any intermediate point is pressure = density * gravity * height. the procedure to apply the pressure is as follows. Model the vessel / tank and create a new coordinate system at the top most point where the liquid will be filled. The X axis of the coordinate system should be pointing vertically downwards.The equation for a straight line is y = m*x. This is the same as the pressure at any point is equal to the density * gravity * height. i.e. y is the pressure, m is the product of density * gravity and x is the height at any point. Go to SolidWorks Simulation and create a new static analysis study. Give all the input conditions. Now for the loading part, go to pressure load. Select the areas for applying the pressure load. Enter the value of (density * gravity) in the pressure field.Select the check box for nonuniform distribution. Select the newly created coordinate system in the coordinate system box. Enter “0” in the constant field and “1” in the X field. Enter “0” in all other fields. The pressure will be applied as a variable pressure load with 0 at the top and max at the bottom. All the loads are applied. Now mesh and run the analysis. Hope this helps.

Re: How to add the boundary condition
Loic Ancian Jan 28, 2011 9:32 AM (in response to Devi Prasad Samal)Recommended procedure to define an hydrostatic pressure:
When defining hydrostatic pressure, the pressure direction should be Normal to selected faces.
The location and orientation of the Coordinate system used to define the variable pressure is important. The best practice it to have the XZ plane lying on the surface of the fluid and to have the Y axis pointing downward (same direction as the gravity).
Select SI as the unit system, and make sure the pressure unit is N/m² and not MPa.
If the above conditions are met, then simply enter 1 for the coefficient of Y and 0 for all 5 others. In the Pressure value field, enter the product of the fluid's mass density. For water at sea level, you should enter 9810 (1000 kg/m^3 for water and 9.81m/s^2 at sea level on earth for gravity).


 But why you need to load the Tank with nonlinear pressure?

