MAT10

Bulk Data Entry Defines material properties for fluid elements in coupled fluid-structural analysis.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
MAT10 MID BULK RHO C GE ALPHA      

Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
MAT10 2 0.5 22.1            

Definitions

Field Contents SI Unit Example
MID Unique material identification.
Integer
Specifies an identification number for this material.
<String>
Specifies a user-defined string label for this material entry. 3

No default (Integer > 0 or <String>)

  
BULK Bulk modulus.

No default (Real > 0.0)

  
RHO Mass density. Automatically computes the mass.

No default (Real > 0.0)

  
C Speed of sound.

No default (Real > 0.0)

  
GE Fluid element damping coefficient.

No default (Real)

  
ALPHA Normalized porous material damping coefficient. Since the admittance is a function of frequency, the value of ALPHA should be chosen for the frequency range of interest for the analysis.

No default (Real)

  

Comments

  1. MAT10 may be referenced by PSOLID entries with FCTN=PFLUID.
  2. The material identification number/string must be unique with respect to MAT1, MAT2, MAT3, MAT9, and MAT10 entries, but may be shared with MAT4, MAT5 or MATFAT.
  3. String based labels allow for easier visual identification of materials, including when being referenced by other cards. (example, the MID field of properties). For more details, refer to String Label Based Input File in the Bulk Data Input File.
  4. BULK, RHO, and C are related by B U L K = C 2 ⋅ R H O MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOqaiaadw facaWGmbGaam4saiabg2da9iaadoeadaahaaWcbeqaaiaaikdaaaGc cqGHflY1caWGsbGaamisaiaad+eaaaa@40BB@ .

    If only two out of the three values are specified, then the other will be calculated according to the above equation. If all three values are specified, then they should be consistent with the above equation to a tolerance of 1.0E-3.

  5. To obtain the damping coefficient e, multiply the critical damping ratio C / C 0 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4qaiaac+ cacaWGdbWaaSbaaSqaaiaaicdaaeqaaaaa@391F@ by 2.0.
  6. This card is represented as a material in HyperMesh.